The museum is seven floors of fastination stuffed into every nook and cranny of this building. Mercer's collection of tools and devices is ginormous. The museum literally has items hanging from every wall and ceiling in addition to the uncountable displays. There are so many interesting items ranging from Native American Indian artifacts, to covered wagons, to whaling boats, to musical instruments, to the first fire engine water pump, to weapons, to huge grinding mill machines... So much to see!
But please note, like Mercer's other buildings (Fonthill and the Tile Works) the museum is all concrete and not climate controlled, so it is hot in the summer and cold in the winter. Dress as if you were going to be outdoors.
We also HIGHLY recommend visiting Mercer's home, Fonthill and his tile factory directly behind Fonthill. It is a great trio.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.