El Faro Punta Mulas, a Spanish-built lighthouse above the ferry dock in Isabel Segunda, dates from 1895. It was built to guide vessels into the harbor, which is surrounded by a chain of dangerous reefs. Its red light is rumored to be seen from as far away as St. Croix and St. Thomas. In 1992, the elegant structure was carefully restored and transformed into a maritime museum that traced much of the island’s history, including the visit by South American liberation leader Simón Bolívar. The tiny museum is open weekdays, but the lighthouse itself is worth a look on any day.