Source: NASA JSC website - Photo taken April 29, 2001 from the Space Shuttle Endeavour
Continuing on from the United States' Skylab and Russia's Mir, the International Space Station, led by the United States, represents a permanent human presence in space. The station is located in orbit around the Earth at an altitude of approximately (??) kilometres, a type of orbit usually termed low earth orbit.
At present, the station has a crew of three, mostly from Russia, and the United States, but occasionally some of the other partners in the project.
Official site: http://spaceflight.nasa.gov/station/