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At 100 Euros for 100 grams, these French black truffles had better not be from China. Photo courtesy of Flickr user epeigne37.

If it looks like a black truffle, and if it cost you $1,500 a pound like a black truffle—it may actually be a Chinese truffle.

That’s because fraudulent vendors here in France’s Périgord region, where I’m shacked up for a week in a village on the Dordogne River, sometimes sell lookalike truffles from China as the real thing, which is loved as an aromatic addition to meat, egg and pasta dishes. They mix the imported coal-colored nuggets, of the species Tuber indicum, into baskets of genuine Périgord black truffles, or Tuber melanosporum, and sprinkle them with cheap but aromatic truffle oil to fool buyers into handing over big bucks for the bland imposters.

It’s a fraud of which hunters and buyers are well aware. The landlord of our rental house, Jean Claude, is a truffle hunter. Each fall and winter, he slogs across his property through the mud, his dog Ceci leading the way as she sniffs out the treasures. Jean Claude says Chinese truffles find their way illicitly into local restaurants and markets. Other times, people buy them knowingly, paying about $100 for honestly labeled T. indicum, even though the mushrooms are essentially worthless. In Italy, the sale of Chinese truffles is illegal, even if they are legitimately labeled. By many opinions, the Chinese truffle has no rightful place in the realm of fine European cuisine—but its presence here is prominent. According to experts, between 20 and 30 tons of Chinese truffles are sold in Europe each year.

Recently the situation has gotten much worse: Chinese truffles have been found growing semi-wild in Italy. French truffle expert Claude Murat made this discovery in 2007, when he was working at the University of Torino. Murat received a call from a suspicious farmer in Italy’s Piedmont region in 2006 who explained that he had planted a grove of young hazelnut trees a decade before, believing them to be seeded with spores of T. melanosporum. Buying inoculated “truffle trees” from specialized nurseries is common among European landowners wishing to cultivate black truffles. But, 10 years after planting the trees, the man had not harvested a single truffle, and Murat, then in his post-doc years, came to investigate. What he found generated a quiet rumble of hysteria among truffle farmers and hunters and the moneyed foodies who buy, cook and eat the black truffle: Chinese truffle mycelium established among the roots of the farmer’s trees.

“We thought it might have been a mistake, so we tested it a second time and we found it was definitely Tuber indicum,” said Murat, now the engineer of research at the National Institute of Agronomic Research (INRA), in Champenoux.

Can you tell the Chinese from the French Périgord black truffle? Even Dr. Claude Murat, a truffle expert shown here with a Périgord black, says the two species are very difficult to tell apart---a big problem for dealers of the fragrant fungus. Photo courtesy of Claude Murat.

Murat says that lab tests conducted by him and his colleagues indicate that the Chinese truffle is a tougher, more adaptable species, more competitive and more tenacious, and when the two have been placed together in a controlled environment, T. indicum has won, he says. But the matter gets more serious than a simple one of habitat competition. T. indicum and T. melanosporum are genetically similar enough that the two can interbreed, posing the risk that the two species may merge into a hybrid that lacks the fetching attributes of the Périgord black. Moreover, the invasive species also has a wider range of genetic variability than the Périgord black, which could allow it to adapt dangerously well to a new habitat.

“There is the chance that Tuber indicum could replace Tuber melanosporum,” Murat said.

Already, T. melanosporum is undergoing tough times. For reasons uncertain, the annual harvest has declined from more than 1,200 tons in 1900 to less than 100 tons today. In the most recent winters, truffle hunters unearthed as little as 20 tons. Experts suspect that modification and disruption of the black truffle’s forest habitat is the main factor in the decline.

Murat says that in Piedmont, there are very few black truffle plantations from which Chinese truffles could spread across the landscape, and so far, T. indicum has not been found growing wild in Europe anywhere outside of the single Italian plantation.

“But if they get into a region in France, like the Périgord, where there are many truffle plantations, it could be a serious problem,” he said.

And for a taste of truffle trivia: The truffle oil that many of us keep in our cupboards (not all of us can afford truffles, okay?) and use to impress dinner dates is usually a product of exquisitely exacting chemistry labs, where experts have learned to duplicate the molecule 2,4-dithiapentane that produces the entrancing scent of wild truffles—especially the Italian white truffle, or Tuber magnatum. This lovely molecule—one of my personal favorites—occurs naturally in wild truffles. Some purists argue that test tube truffle oil is fake—but is it really? Because for my unwitting dinner guests, a whiff of that stuff takes them straight to the Périgord faster than a flight on Air France. Ignorance and truffle oil are bliss.

The Dordogne River flows through some of the finest country of southern France. Truffles, cep mushrooms and wild pigs occur in the woods, while huge catfish and pike lurk in the slow eddies of the river. Photo courtesy of Flickr user davidmartinpro.

Ernest Hemingway popularized the cosmopolitan lifestyle of idleness, coffee shops and people-watching on the noisy boulevards of Paris. The author wrote some decent books in the process, but I still think Hemingway missed out every day that he wasn’t walking or cycling through the forested hills of the Périgord, the large agrarian region just east of Bordeaux and north of Spain and famed for its wild truffles, cottage fois gras industry and pre-modern cave art. There is a cafe here in the village of Saint Julien de Lampon, where we have a house for a week, and we can sit there if we like, watching the church tower and the villagers coming and going from the butcher shop, but I’ve got better ideas for the next six weeks that I’ll be traveling here, like these:

Search the shallows for pike. They’re as big as logs, mean as crocs and hungry as bears: northern pike. These spectacular predators eat ducks and rodents and will attack other fish their own size or greater, and they live in the Dordogne River. In his college days, my dad spent some time canoeing in Minnesota’s Boundary Waters, where he and the boys went skinny dipping in pike-populated waters and jokingly called it trolling. Here, I’m keeping my shorts on when I go swimming. Probably the best way to see a pike is to peer off bridges into the slow current or stalk along the bank while watching the sloughs and backwaters for what seem to be submerged logs drifting upstream. I’ve already seen several near the village. Climbing out on horizontally leaning tree trucks and looking straight down on a slow pool for 30 minutes is a good method—and when you see one of these monsters drift past in the Dordogne, you can be sure that you’ve met the king. Or maybe you haven’t—because we just read in the papers that a local angler caught a 100-pound wels catfish recently, and the wels isn’t just a duck-eater; supposedly, it has swallowed children.

Ride a bicycle. They’ll hit you with extra luggage fees at the airport for daring to bring a bike overseas (and if you’re especially lucky, like me, they’ll leave it in London overnight), but once you’re rolling on the solid ground of France, a bicycle will set you free. A vast network of small, smaller and smallest roadways crisscrosses the nation. Many are paved paths hardly wide enough for a Fiat that lead through the woods and past forgotten farm houses and crumbling chateaus, along rivers and up mountainsides. Forget your map and just keep rolling–and if the road turns to dirt, don’t stop. It may even disintegrate into a rutted wagon trail or footpath, but almost without fail, just when you thought maybe you were in fact lost, the trail will dump you out again onto the highway. In this scheme of exploration, there is rarely backtracking or getting truly lost. Instead, one becomes familiar with a rare but thrilling déjà vu sensation—after a hungry day of pedaling in circles on unmapped roads—of winding up by accident right back again where you started.

Walk into a Cave. People have been doing it for millennia here, and in many nearby grottoes the paintings of pre-modern people remain on the walls. My nephew, who is seven, can paint better than they did, but to see bison, mammoths and bears scrawled by human hands 150 centuries ago is an awesome reminder of the reality of a history most of us only know from textbooks. The Lascaux, Pech Merle and Cougnac caves are three of the most famous. Lascaux, closed to the public, is only viewable via a reproduction of the original art, while at Pech Merle, you can see the real thing—plus animal bones and human footprints.

Tour the farmers markets. French chefs have taken crocks of credit over the years for wowing diners with their classic sauces, bricks of pate, rustic soups, wild game and pastries—but let’s face it: It’s the open air farmers markets where French food really comes from. Even the tiniest villages here host weekly assemblies of gritty-fingered peasants selling their cherries, beets, potatoes, walnuts, berries and greens. In Saint Julien there is a regular paella vendor, and makers of cheese, sausage, fois gras and wine do business here, too. Yeah, you could eat yourself ill at any local restaurant, where roughage from the garden and stewed potatoes soak in butter and duck fat. I say forget dining out, because no meal here is more gratifying than one cooked at home from a canvas sack of market goodies and eaten on the lawn until the sun sets at 10. The Saint Julien market arrives each Thursday. Souillac’s market is Friday. Sarlat, the nearest big town, has its market on Saturdays and Wednesdays. In, Gourdon, a medieval town on a hilltop, market days are Saturday and Tuesday.

American tourists negotiate for fois gras---or fatty duck liver---at the Saint Julien farmers market. Photo by Alastair Bland.

Buy bulk wine in a plastic jug. Fine restaurants in America are now serving wine on tap for $4 a taste, but in reasonable France, they’ve been selling table wine in bulk for ages. In the rear shadows of many wine  shops (behind all the labeled commercial bottles), you’ll find a spigot coming off a barrel of some local plonk, offering perfectly decent if cheap wine by the pint, liter or gallon. Fill your jug, screw on the cap and go find a bench along the bike path or a grassy knoll above the river.

Hunt the cep. Europe’s favorite wild mushroom floats in three sing-song syllables off the tongues of Italians, but in France, the porcini is just the cep. No matter. This renowned mushroom is the same across all Old World borders—fat pig-like stumps with white stems and tawny brown caps that bulge from the leaf litter beneath chestnut trees. That blue and beaten-up Renault parked at the edge of the forest? That’s probably a cep hunter’s. Follow quietly, track him down and discover his secret patches. Better not collect your own unless you really know your shrooms, but there’s no harm in taking a walk in the woods—though you’re wasting your time if you look up. Other fungi hunting opportunities: Its season is the winter, and if you come here in December, remember that the Périgord black truffle grows among hazelnuts and oaks. You’ll need a good dog to sniff them out, although some walkers watch for vertical columns of tiny flies just above the ground—often a clue that a cluster of the world’s most pungent mushroom is hiding below. Warning: Truffle patches are often on private property, and truffle hunter landlords may shoot trespassers.

Go to Spain. The cheese is just as smelly. The rustic country cuisine is by and large the same. The people, like their French neighbors, live by espresso and wine. But the crowds are less and cost of living about half. The mountainous border along the Pyrenees is just 200 miles south of here, and three days ago as my plane landed in Toulouse, I caught sight of these peaks, still buried in snow in this exceptionally late-blooming spring. Even Hemingway ditched his beloved France for Spain. Soon, so will I.

However much one loves France, it may be impossible to resist visiting the Pyrenees---and Spain beyond. Photo courtesy of Flickr user Laurent Jegou.

The deathstalker scorpion, a Middle East native shown here in captivity, kills several people each year and occasionally hammers its stinger into the hands of hobbyist collectors. Photo courtesy of Flickr user Furryscaly.

Give me a rainstorm in the night, a herd of pigs trampling past, even a bear—but if I’m camping without a tent, spare me the bugs. Because it’s the little things in the woods that creep many of us out the most, and the thing is, not all of them are so little—and worse, some have fangs and a hundred legs. Centipedes that can overpower a snake, spiders a foot wide, rodent-sized scorpions and other creepy crawlers of the forest floor offer good reason to sleep inside a tent. For years, I only camped under the open skies. If it rained, I would wrap up in a tarp or sleep under the awning of a church. But one night in Portugal while reading a book by the light of my headlamp, a huge spider with legs like an imperial walker came dancing onto my tarp and into my lap like a mad dervish. I screamed, panicked, flew home and bought a one-person, three-pound backpacking tent. That doesn’t mean I always use it, but here are a few good reasons why I should:

Deathstalker scorpion (Leiurus quinquestriatus). The deathstalker scorpion just might have the coolest name in the animal kingdom. A Middle East native, it grows to four inches or more in length, brandishes a horrifying pair of pincers and lives up to its name. Often described as “very aggressive,” it hammers its stinger into many people every year, killing several. Most victims, though, just suffer extreme pain in the region of the bite, along with drowsiness, fatigue, splitting headaches and joint pain, with symptoms sometimes persisting for months. Meanwhile, most scorpions are less dangerous than simply creepy. David Quammen—an admitted arachnophobe—elaborates on this in his essay See no Evil, published in his 1988 collection The Flight of the Iguana. He writes, “…scorpions are perhaps the most drastically, irredeemably repulsive group of animals on the face of the Earth, even including toy poodles.” Tent, please.

Goliath bird-eating spider (Theraphosa blondi). The biggest of the tarantulas and the world’s largest arachnid, the Goliath bird-eating spider lives in the rainforests of South America. Its legs can span the width of a dinner plate (should it find its way into your kitchen cupboard) and it’s large enough that it can, with ease, kill and eat mice—not to mention birds. The animal’s fangs may be an inch long, and yes, they will inject venom. However, the bite of a Goliath bird-eater is hardly worse than a bee sting to a human—but for campers, do you really think that matters? No way. This beast is among the nastiest things that could skitter across your face in the dark night of the Amazon. Zip up your tent.

Giant desert centipede (Scolopendra heros). On a hot afternoon in September 2003, I was bushwhacking out of the mountains in the Baja California desert not far from La Paz. I fought and kicked my way through the thorns, ducking through tunnels in the brush, and finally made it to the quiet shore of the Sea of Cortez. I plopped down in the sand, my back against against a rock, opened my backpack, and went digging for my mask and snorkel—and then appeared the ugliest monster I’ve ever seen: a seven-inch centipede that came snaking out of the pack, right past my arms and on a trajectory for my face. It was, I’m almost sure, Scolopendra heros. I screamed in a howling panic, leaped from the sand, and went backpedaling into the water, where I fell on my butt and and watched the centipede vanish into a rockpile. This creature, I later was told, is poisonous and can, if it feels especially wicked, bite and deliver venom with its fangs as well as some of its legs. And you want a much, much nastier story? In a documented case in Arizona, a man put a garden hose to his mouth and turned on the faucet to have a drink—and can you guess who came charging out of the nozzle? S. heros scuttled right into his mouth and bit his tongue, leaving him in pain for days.

This giant desert centipede has overpowered and killed a lizard. A tent may block your view of a meteor shower, but it'll keep monsters like this from scuttling into your sleeping bag. Photo courtesy of Cabeza Prieta Natural History Association.

Bullet ant (Paraponera clavata). An inch long and known to jump from trees upon its victims, the bullet ant of Central and South America delivers what is said to be the most painful sting of any arthropod. It hurts like a bullet wound, people say, and the pain may persist for 24 hours. In the ant’s defense, Paraponera clavata is not aggressive unless bothered—so if you get stung, you must have asked for it. The ants also offer fair warning before attacking, emitting a musky odor and an audible “shriek.” If you detect anything of the sort while hiking in the Amazon, turn and run—or just suck it up and experience this phenomenal bite like a man,which is exactly what teenage boys in certain forest cultures do to prove their manhood. Anyway, the bullet ant’s bite rarely kills. 

Brazilian wandering spider (Phoneutria fera). Widely considered the most poisonous spider in the world, wandering spiders reportedly hospitalized about 7,000 people in Brazil alone between 1970 and 1980 and may have killed more people than any other arachnid in the world. Phoneutria fera is often regarded as the main offending species, but others of the same genus, including the Brazilian huntsman, have similarly toxic venom. The spiders are known to wander and explore, often hiding in clumps of bananas, and often entering homes to have a nap in the toes of a shoe by the doorstep or a vacant pant leg in the clean laundry pile—and surely a cozy sleeping bag would be a fine dwelling site for a wandering spider. Symptoms of a bite include pain, redness and immobility in the area of the bite. Paralysis and death by asphyxiation may follow. In survivors, tissue affected by the poison may die and rot away. Another bizarre symptom immediately following a bite in men is a painful erection lasting hours and sometimes causing impotence.

Mosquito (Family Culicidae). Consisting of 41 genera and more than 3,500 species in the family Culicidae, mosquitoes may not inspire nightmares or make our skin crawl the way that arachnids can, but what other element of nature so frequently ruins a night of camping? Whether on the boggy tundra, in the blazing desert or in the swamp country, mosquitoes may swarm us in clouds. Even a bona fide house with walls and a roof can’t always protect against mosquitoes, and in parts of the world people sleep with permanent netting over their beds. These insects insect may be the most dangerous, too: in 2003, malaria killed 3 million people—infected thanks to mosquitoes. And these bloodsucking disease vectors dealt me what was one of the most torturous nights of my life while camping (with no tent) on the shore of a mangrove lagoon in Mexico. After about 500 bites, I went stumbling into the village around midnight and pleaded with a bartender for bug spray. He said citrus juice was the most potent mosquito repellent—trick from his grandmother—and he threw a lime at me from his cocktail making tray. It didn’t work. After bite 2,000 or thereabouts I wrapped a towel around my head, jumped in the water and breathed through a snorkel until dawn brought relief.

The handsome face of the bullet ant, a New World jungle native whose bite may be the most painful of any arthropod on Earth. Photo courtesy of Flickr user EOL Learning and Education Group.

These cyclists are enjoying another day on the trail in the Crocodile Trophy, in northeastern Australia, considered one of the most punishing bicycle races in the world. Photo by Regina Stanger/Crocodile Trophy.

As the famed grand tours of summer begin rolling through Europe on carbon frames and ultra-light wheels, a number of lesser known but perhaps much more rigorous races are also gearing to go. They include cycling and foot races that take athletes through some of the world’s most spectacular and rugged country, as well as to the boundaries of what humans can endure, physically and psychologically. The more demanding of them allow no rest or sleep—unlike the more publicized stage races—and amount to nonstop endurance tests lasting as long as a week or more. Some of them also allow almost anyone to enter, in case you’re interested in trying your muscles in what might be the most unenjoyable tour you’ll ever take of the Sierra Nevada, the Rocky Mountains, the American desert or the Australian outback. Here are a few options for your next vacation:

Race Across America. Called RAAM and widely considered the hardest road cycling race in the world, the event starts in mid-June in Oceanside, California and leads several hundred dogged competitors more than 3,000 miles across the entire country to Annapolis, Maryland—without stopping. Last year, Christoph Strasser, now 29, pedaled the distance in eight days, eight hours and six minutes. RAAM soloists (racers in the team divisions take turns riding) may take cat naps totaling an hour of shuteye per day, but the general idea is, you snooze, you lose. The race is so demanding that many cyclists don’t finish at all. Some have died trying. Others begin losing their wits. Some solo riders may even lose their teeth as they eat sugary foods nonstop to replace the 10,000 calories that they burn a day, and for those that don’t brush at each pit stop, teeth may decay rapidly. To get a good taste of what this race offers before you consider attempting it, read Hell on Two Wheels, in which author Amy Snyder elaborates on the many forms of misery that one can expect while pedaling without rest across the continent.

Badwater Ultramarathon. For many foot racers, running one marathon isn’t enough. Nor are two, or three, or even four, and the Badwater Ultramarathon amounts to five—135 miles of trotting through some of the hottest, grittiest country in the world. It begins as low as one can go in the western hemisphere while still keeping your feet dry—at 282 feet below sea level in Death Valley. From there, it only goes up, with runners eventually finishing—or trying to, anyway—at Whitney Portal, 8,360 feet above sea level. As though such mileage and elevation gain weren’t strenuous enough, the race takes place in July, when temperatures may easily exceed 110 degrees. No one has ever died in the Badwater Ultramarathon, but between two and four out of every 10 runners fail to finish each year. The record time of completion is 22 hours, 51 minutes.

Western States Endurance Run. What began in 1955 in the Sierra Nevada as a 100-mile horseback competition shifted to a super-marathon foot race in the mid 1970s as men and women began to wonder if they, too, could trot for some 20 hours and 100 miles nonstop. Today, the “Western States 100” takes place every Saturday of the last full weekend in June as hundreds of the hardest-core runners in the world start on the notorious 2,500-foot climb over the first four miles and proceed on old mining trails that ascend a total of just over 18,000 vertical feet. The route goes from Squaw Valley to Auburn, over country so rough that only horses, hikers and helicopters can come to help, in case runners should fall ill or injured. The race begins at 5 a.m. sharp, and runners must cross the finish line by 11 a.m. The next day.

For many of us, a 30-minute jog will do. But this runner, just finished with the Western States 100, has been trail trotting for over 27 hours. Photo courtesy of Flickr user runnr_az.

Paris-Brest-Paris. Considered the great granddad of ultracycling endurance events, the hallowed Paris-Brest-Paris was first held in 1891, an 800-mile sprint from Paris, out to the coast at Brest and back again. Like the Race Across America, the PBP is a catnapping affair, with cyclists going nonstop and striving to complete the ride in less than the 90-hour time limit. But unlike RAAM, PBP is a ride, not a race—though it once was. The contest took place once a decade, until 1951. Now, the PBP occurs once every four or five years as a recreational ride, or randonnée. The most recent PBP took place in 2011. While the stakes in the PBP are far less than in pro racing events, cyclists must still abide by some rules. Notably, there is generally no vehicle support allowed, and riders are expected to make their own repairs, fix their own flats and, if they need an emergency recharge, stop for croissants and espresso on their own dime, and clock.