Currently set in the year 2094 (likely to change), Erdstadt (lit. "Earth City") is a potential design for a "world capital", built from scratch somewhere in Switzerland. It serves both as a home for the government of a [partially] United Earth.

Things to be added:
-Most things cities have
-Cultural districts celebrating different cultures (line U3 is already set to end at Russlandplatz, for example)
-More government institutions
-An air/spaceport
-Etc.