A very cool look into the past as you enter through a reconstruction of a section of the Key West Rail Station. The themed mercantile store was very interesting and gave a nice historic view of goods sold at the time. You can also buy railroad memorabilia, gifts, and related style souvenirs. Hit Dante's Poolside Bar next door after, it is right there by the seaport.
Go here for sure, afternoons are the best. We save the inside stuff for the hotter mid-day full sun times of the day. It really is the way to tour Old Town Key West.