The UN Space Station is a selectable arena in Mortal Kombat vs. DC Universe.
This orbiting satellite is the headquarters of the heroes of the DC universe (better known as the Justice League). It was built with the jurisdiction of the United Nations to monitor any suspicious and dangerous activity that could become a serious threat to Earth.
In the DC comics, movies and series, the station was often called two names: the Justice League Satellite and the Justice League Watchtower.