South of Lake Ocota, across the spirit-haunted Bandu Hills, the Screaming Jungle looms like a wave of verdant terror on the horizon. The confounding tangle of towering trees and sentient man-killing plants gets its name for the constant screeching of millions of monkeys that inhabit the canopy. The cacophony can be heard several miles in all directions of the forest, and most travelers notice the screaming before the woodland itself comes into view. The most significant community within the Screaming Jungle is Osibu, site of the world-spanning Nemesis Well — into which the Pathfinder Durvin Gest famously thrust the Lens of Galundari in 4332.
Sources: Pathfinder Chronicles Campaign Setting