I took my son and nephew down to Greenfield Village in Dearborn near Detroit, MI today. There's a lot of neat stuff, including the 1900 era machine shop with running line shafting power (not from the stationary steam engine, unfortunately) and the rail roundhouse with locomotive maintenance underway.
The nephew got to make a little brass candlestick on an old turret lathe running off the line shaft. In addition, there were several planers, a shaper, lots of old horizontal mills, lathes, and boring machines.
The roundhouse included a walkway under a medium size loco with about5' or 6' drivers. All the throttle and valve linkages were visible from the underside. Fascinating stuff.
We also went through Edison's Menlo Park shop (more machine tools) and lab and the Wright brother's bicycle shop. I'll have to go back, we didn't even get to the museum. Unfortunately, nothing was going on in the blacksmith shop. Maybe it'll be open in the summer.
I recommend a visit if you're within driving distance of Detroit. It'd fit in well with a visit to NAMES.