Fort Pulaski National Monument

Steve’s take

A beautifully preserved Civil War fort on Cockspur Island near Savannah — massive brick walls, working drawbridge, and cannons your kids will climb on while you explain siegecraft like you know what you're talking about. The Union bombardment in 1862 made every brick fort in the world obsolete overnight. Your kids won't care about the military engineering revolution, but they absolutely care about climbing on cannon. About twenty minutes off I-95 east of Savannah.