The airport is a airport with a place for cars to Drive, A parking Space, Ramps, and Planes.
It has Passageways to the City and Off Road.
It has Ramps that cars can go on and it is accessible from the off road and city through tunnels and also on top of the City one is one of the last secrets. You were able to go into pits from that place and go to the city or off road. You can not now so to get out, you should reset the game.