The International Space Station was a cramped, humid, puny three rooms when the first crew moved in. Twenty years and 241 visitors later, the complex has a lookout tower, three toilets, six sleeping compartments and 12 rooms, depending on how you count.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/10-spacestation.jpg)
Source:
https://phys.org/news/2020-11-space-station-years-people-orbit.html