End City, the third available location. It contains the following:
Mid District is the actual city, most of it. It contains high skyscrapers and advanced locations.
Downtown features the ruins of an old Rescue Phoenix that went down under mysterious circumstances.
The Subways are just that, citywide subways. Busy and advanced, using powerful trains that go ridiculous speeds.
The Highways end up going to Neo City. They are long, very long, and important locations, the only way into End City other than by flight.