Ghost Town
The Ghost Town in Grand Theft Auto III, is a "hidden" place, not supposed to be accessed during normal game play. It is used in the introduction to the game where Claude is helping to rob a bank, before being betrayed and shot by Catalina. The Ghost Town is basically a street with the Liberty City Bank, some stores and apartments, and a Mr. Wongs, an Esperanto, and three Securicar's parked on the street.
During gameplay in the console versions of the game, it can only be accessed by flying the Dodo there, very few of the objects are solid, so there is nowhere to land and look around. However, a patch was made for the PC version that places a bridge, which allows the player to reach the Ghost Town more easily.
The Ghost Town is noticeably more detailed than Liberty City itself; the alley behind the bank contains dumpsters, carboard boxes, and even various items of garbage strewn across the ground. Most of the apartments above the alley/streets also feature air conditioning units on the windows, like some buidlings in real-life. The sidewalks, however, are empty, with the exception of a few street lights and parking signs.
External Links
Bridge to Ghost Town Patch - made by Homer Simpson - via TheGTAPlace.com