Conservators work to preserve the H.L. Hunley submarine (Courtesy Friends of the Hunley)
In 1864, the Hunley became the world’s first successful submarine and then mysteriously vanished. Lost at sea for more than a century, the Hunley was located in 1995 and raised in 2000. The submarine now rests in a 75,000-gallon tank while scientists are at work to excavate and conserve it. See the Hunley and enjoy new interactive exhibits during the 20-minute tour. Open Sa 10 am-5 pm, Su noon-5 pm. Tickets: $8-16.