Reached by climbing the Queen's Staircase, this fort was constructed in 1793 by Lord Dunmore, the royal governor. You can take an elevator ride to the top and walk on the observation floor (a 38m-high/125-ft. water tower and lighthouse) for a panoramic view of the harbor. The tower is New Providence's highest point. This fort's so-called bow is patterned like a Mississippi paddle-wheel steamer; it was built to defend Nassau against a possible invasion, though no shot was ever fired.
Though the ruins hardly compete with the view, you can walk around on your own here. Be wary, however, of the very persistent young men who will try to show you around; they'll try to hustle you, but you really don't need a guide to see some old cannons.