Panpo features an extensive “undercity” full of old buildings and collapsed corridors. Unauthorized access is strictly prohibited due to the belief that the rampant illness that plagues Panpo stems from the undercity, as well as the very real dangers associated with underground locations. Due to geography, nearly all entrances to the undercity can be found in Lowbarrow.
Most undercity locations are small, though a few connect to one another. Vermin of various sorts often take up residence in the undercity, as well as the occasional tunnel-dwelling monster.