Unlit Passageways

A series of winding tunnels and passages, the paths seem nonsensible, and those who explore blindly could swear the paths overlap in ways that do not make sense in a standard three dimensional plane. No attempt to establish light has ever worked, and regardless if its natural caves, worked paths with pick and shovel, or bricks and stone built up, there is never light that is not carried by someone. The only dangers are getting lost, and those that other denizens might pose.