Towering above St-Tropez is the Citadelle, an early 17th-century fortified castle. It’s not just the best place in town for escaping the crowds and soaking up the sun. It also boasts a hexagonal dungeon (sure to appeal to tiny travelers) and an elaborate moat system—as well as stunning views over the Bay of St-Tropez. Within the Citadelle sits the Maritime Museum, which charts the history of the city's longtime love affair with the sea. Two floors detail activities that range from 16th-century traders' exploration of the eastern Mediterranean to historical figures including Admiral Suffren, who whupped the British several times during the War of American Independence.