I am a history nut, and I have been wanting to see this for a long time. It is amazing to look at this hunk of metal in a tank, and realize it's history. Our guide for the 45 min tour was very well versed in her history, and gave some real insight into what happened, how they found out the crew members, and thoughts about what went wrong. (My idea is that they just ran out of oxygen and went to sleep = carbon monoxide poisoning.) There is a "mock up" that you can sit in to get the feel for what these guys were dealing with, and a gift shop to buy some Hunley stuff. It is a little hard to find, and if you use GPS, make sure to put North Charleston as your city!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.