there is one in Scranton Pa
and one in the Midwest Rail museum
(Big Boys that is)
There are two in a railroad museum in northern Illinois. I visited it about 15 years ago and got some pictures of my children sitting on the them. These machines were truly awe-inspiring. I got the same feeling from looking at them and touching them that I got from watching a rocket take off. Even silent and rusted, power radiated from them. I am so pleased someone is bringing one back to life. Seeing it move will be a tremendous thrill.