Variant is an early test bed city for Midtown Madness 2 that was cut from the game's final release. It is basically San Francisco but without any buildings (other than some parts of the Golden Gate Bridge) and it also lacks a lot of water and a textured sky. It can still be driven on when MM2 Revisited V4 or V5 is installed. Oddly, it may cause game crashes while loading on some computers.
Abandoned City might be based on this track as it shares a lot of similarities with Variant.