dry tortugas national park

Photo: andyKRAKOVSK/istock

3 of 6
3. Dive for Treasure: Dry Tortugas National Park, Florida
In 1907, the Avanti, a Norwegian cargo vessel, crashed into a Floridian reef. In 2017, scuba- or snorkel-inclined visitors to Dry Tortugas—seven islands about 70 miles from Key West—can inspect the Avanti’s still-intact bow and stern, along with an otherworldly world of coral reefs.