bill gate's house/mansion/castle/batcave
 

well, i think his place is bigger than the national park :)

_http://www.goehner.com/gates.htm

I remember an interview that I read where Bill Gates was talking about the trampoline room he has. He had the entire floor ripped out and put a trampoline there in it's place, then padded all the walls so he could step in and literally bounce around the room.

Oh to have so much money to spend on useless things.