Bungie have just released the very first screenshots for the Ghost Town map, which is set to be included in the second map pack coming soon for Halo 3. Below in a brief overview of the map, as well as a link to the screenshots gallery.
Ghost Town is the fragmented ruins of a small 24th century water purification complex that geographically lies just North and West of the jungle foothills hydroelectric facility from the Sierra 117 mission. The well-protected facility built into a shallow ravine was once home to the Global Water Campaign, where the still somewhat-pure Kilimanjaro meltwater was transported via pipelines from the river and directed to this small outpost where it became further purified, and then transported via GWC trans-African pipelines along the Tsavo Highway for distribution throughout the entire continent.