If only you could drive to it.
Fort Sumter is an interesting monument to take in. Touring the Fort is interesting as one can imagine being trapped in it during the outbreak of the Civil War.
The bad part about touring Fort Sumter is that it is only accesible by boat. The ferry fee to the location is rather expensive and then visitors only have an hour to tour the site before they're expected back on the ferry. If you're the type that likes to read signs and take your time at exhibits, this can be very annoying.
Wind is also a factor when visiting the site. They are almost strong enough at times to blow a person off balance.