Lancaster County is *the* spot for train enthusiasts!

If you like steamer trains then you must visit Lancaster County. The Railroad Museum of Pennsylvania has over 14 steam locomotives, 11 passenger cars, and a 1950's freight train on display. I was able to identify a few of the trains in the Microprose game Railroad Tycoon. Somewhere in Lancaster County you're also able to ride in the passenger car of a working steam driven train! You will roll by the countryside and see lots of Amish farms. I was able to see a barn being raised by an Amish community!

When you're done visiting real trains, there are a few model train museums in the area including the National Toy Train Museum. They have model trains from the late 1800s to now.

http://www.virtualcities.com/ons/pa/l/as/pal99a15.htm was used to augment the memory from my childhood.