This is a deep, extremely dark cave that separates Shadow Country and Wind Country on Kagegakure's south-western border. The cave is like a maze, with many dead ends and almost no light whatsoever. This is among the main reason the village of Kage is called "Hidden in the Shadows". Unlike the Angel Bridge, which connects the Shadow and Mist Countries on Kage's eastern border, the cavern is guarded by the local Anbu Black Ops. This is not because of fear of invasion, but if somebody planted explosives or other dangerous objects in the caves, things could get messy.