Ghost Town
From Halopedia, the Halo wiki
O.K. Corral[1] is a Halo 3 multiplayer map.
Almost nothing is known except that it is asymmetrical and a medium ranged map. It had its lighting "changed considerably" to better fit the "death-at-sunset feel." 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".