I've always wanted to just hitch a ride on a train.  The real adventurist in me wants to pack a backpack and just jump on and get off whenever i feel like it.  I've seen "Into the Wild" though, and I surely do not want to run into one of those situations where I get the crap beaten out of me by a conductor with a crowbar.  I just want a way to wind up in a random location, not knowing where the heck I am, and that's the only way I can think of.  Every other way involves seeing road signs or landing in an airport.  I guess a hot air balloon my achieve what I desire, but you can't really walk away from a hot air balloon easily...