any "must see" train places near Madison, WI?

I’m going to Madison Wisconson for a couple days. Any “must see” train (or other) things to see?

thanks
TPL

I’m partial to the Mid-Continent Train Museum - but it’s probably an hour away - see http://www.midcontinent.org/ Here’s a link to find hobby stores - type in Madison: http://www.hobbyretailer.com/QuickResults.asp