You can also take a 4 or 5 day hike to get there - for much hardier souls of course. I think it comes with porters.
Aguas Calientes is a nice little compact town on the Urubamba River. (Flooding due to major rains wiped out the train line in2010 and caused our trip then to be delayed until the fall.)
Click here for some pictures of things seen along the way and in town.
This short video give a view of the town and you see it is surrounded by mountains.