Dank Caverns of the Fallen

"A maze of tunnels digging deep through a volcano, you must watch your step as a few of the tunnels end with quite a long, deadly drop. Thieves and gangs of criminals used to use these tunnels as a means of raiding the village, but the Tsuchikage swept through it a few years ago along with some ninja of the village, and cleared it out. Occasionally, people find openings to caverns that had been sealed shut through an unnatural means, and, once opened, the skeletons of the thieves, killed and left to decay, have been found there. Talk about a skeleton in the Tsuchikage's closet..."