U.S. Caribbean Territories: Puerto Rico and U.S. Virgin Islands
1. San Juan: La Fortaleza and San Juan National Historic Site – a World Heritage Site, and the rest of Old San Juan
2. El Yunque National Forest
3. Bioluminescence in Mosquito Bay at Isla de Vieques
1. St. John: Virgin Islands National Park
2. St. Croix: Salt River Bay National Historical Park & Ecological Preserve, Christiansted National Historic Site, and Buck Island Reef National Monument
3. St. Thomas: Charlotte Amalie (Blackbeard’s Castle, Frederick Lutheran Church, 99 Steps, and Government House)
Note: Navassa Island (no permanent population) is a U.S. territory in the Caribbean near Haiti, but it is listed with the other U.S. Minor Outlying Islands for organizational convenience.