Train Tunnels

Train tunnels are underground tunnels made for train passage. They may run underneath cities, across mountain ranges, or connect subterranean locations. They may contain maintenance rooms and maintenance tunnels. They may be sites where abandoned train cars are located. In narratives, they are often used by those traveling on foot as a hidden or alternative route but may contain dangers. They may be home to vagabonds, post-apocalyptic monsters, and the infected.
