INTERNATIONAL SPACE STATION -

A video posted to YouTube provides an in-depth tour of the International Space Station hosted by astronaut Sunita Williams.

Williams, the former commander of the space station, recorded the 25-minute video, which shows her floating around the ISS the day before she left the orbiting outpost.

The video tour explains the function of each room, including a peek into where astronauts sleep and keep their personal belongings.

Watch the tour below.