Shaped like a paddle-wheel steamer, this hilltop fort was built by Lord Dunmore in 1793 to guard the harbor against invaders. Never used, it was eventually converted into a lighthouse. The fort itself is not particularly fascinating, but it’s worth the trip for the sweeping panoramic views from the top. Young ‘tour guides’ will try to offer their services – you won’t need them. The Queen’s Staircase leads the way up. Carved by slaves from solid limestone, it’s one of the island’s most enduring landmarks.