Tetratropolis

Tetratropolis is the largest Terra in the known Atmos, and also rules over the largest number of other terras. It is a Capital of the New Cyclonia Empire.

Appearance
It is the Huge Tower surrounded by storms. Cyclonia also hosts resort vacation facilities.

Interior

 * Shelter: The inside of the City, filled with cogs and gears, high-speed transport rails, elevators, cranes and many other mechanisms.
 * Hanger: A hangar large enough to hold Fleet of Numerous Battleships.