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.