"It’s difficult to imagine now, but when the first battle of the Civil War broke out, the people of Charleston ran to their rooftops to watch the show—at 4am, the cannon fire looked almost like a fireworks show. As then, the ruins of the fort (which is now a National Park) can only be accessed by water, so you’ll have to book a boat tour with Fort Sumter Tours or drive a private boat there to do any exploring. On the way, keep an eye out for dolphins, which can usually be seen swimming around the sailboats in the harbor. "