Brimstone Hill Fortress National Park — the "Gibraltar of the West Indies"
Climb the volcanic spur to a colossal 17th–18th-century British fortress, the best-preserved garrison fort in the Caribbean and a UNESCO World Heritage Site, with cannon-lined bastions 800 feet above the sea. From the citadel of Fort George you take in a sweeping panorama of the Caribbean, the green flanks of Mount Liamuiga, and the silhouettes of Nevis, Saba, Sint Eustatius and St. Barthélemy floating on the horizon. It is the single most extraordinary thing to see ashore on St. Kitts and the island's defining bucket-list sight.