Starlit Abode of the Ratmen

Publisher's blurb:

The moon shines down on the rocks in this area that have been carved away overtime by the streams which run through the mountains. Poorly constructed wooden bridges have been made to bridge the gaps between the stony chasms and dreary dying trees and fetid plants cover the ground.

Strange mechanical devices and pipes jut from the rocks and leak bright green toxic liquid and an entrance to a dark cavern lies at the center of this encampment.