Ghost Town
From Halopedia, the Halo wiki
Template:Multiplayer Map Infobox O.K. Corral[1] is a Halo 3 multiplayer map.
Almost nothing is known except that it is asymmetrical and it is a small map. It had its lighting "changed considerably" to better fit the "death-at-sunset feel." The level has been describes as a bridge between nature and failed human civilization.[2] It is reported to have many multi level, open air cat walks with sights down to semi protected alleys where you can "rain death from above".
This may be a reference to the Gunfight at the O.K. Corral, hinting the name. So it may be inferred it is in a city like map. Much like Bungie said perfect for medium and close range battles. Combining this with the fact of the catwalks, it may be a remake of the Halo 2 Multiplayer map Turf. As it featured two catwalks on 2nd stories and several alleys.