Transdimensional Trains

Type: Trandimensional
Transdimensional Trains are just what they sound like - mystic trains that travel between dimensions of existence. They are often occupied by polite and uniformed employees, as well as other 'travelers,' as these Trains make their designated stops from world to world. If you have a ticket, you can get stopped off at a destination of your choosing. 
Tales are told of some 'lost' Transdimensional Trains which operate as ghost ships, with no one board. The Train simply keeps chugging away, ramming itself through dimensional walls as it refuses to stop.