This is a space station I designed.   It's part of a collaboration I did with three other talented concept artists who designed characters etc.  The premise was to have a place where races could come and trade their resources with other planets easily.  The station has an elevator connecting it and the planet so people coming to it wont have to break the atmosphere to interact with those living beneath.  Furthermore other planets have set up shop here so one may find many different goods from many different planets.  It's a pretty good set up.