Located inside Aruba’s oldest surviving structure, this museum offers a fascinating look at the island’s evolution. Open weekdays, it boasts artifacts from the Caiquetio people and Dutch colonialists as well as items from modern-day Aruba. The complex itself, however, is the real draw. Dating from 1798, it was constructed to defend the island against pirates. The adjacent Willem III Tower was built in 1868 and served as Aruba’s first public clock and lighthouse.