Smithsonian.com

With four expeditions under her belt (Expeditions 14, 15, 32 and 33), in two trips up to the International Space Station in 2007 and 2012, astronaut Sunita Williams holds the records for the most time spent in space, the most space walks and the most time spent on spacewalks of any female astronaut.

Given her extensive spaceflight time, a total of 322 days, Williams seems to know the walls of the ISS pretty well, and she shares that knowledge in an extensive guided tour of the station, filmed during the final days of her most recent mission. The 25-minute tour takes you all over the orbital platform, with Williams highlighting some of the quirks of life in space.

Williams, along with Russian cosmonaut Yuri Malenchenko and Japanese astronaut Akihiko Hoshide, returned to Earth last week, landing safely in Kazakhstan.

More from Smithsonian.com:
It’s Now Legal for Early American Astronauts to Sell Their Space Toothbrushes
How Astronauts Take Such Beautiful Photographs in Space