Las Noches dungeons

Deep under the dome of Las Noches, buried in the sands of Hueco Mundo, are dark dungeons. They are very deep and very dark. They are there since the times of Baraggan and they show it. There are trapdoors above them and careless visitors often fall through. They then have to wander around the dark corridors until they find an exit. It isn't hard to find one, because the dungeons weren't meant to be a prison. In fact, their purpose in Las Noches is unclear, but every villain lair needs some dungeons.