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- Afghanistan32
- Gulf Islands National Seashore (Fla. and Miss.)2
- Assateague Island National Seashore (Md. and Va.)1
- Balochistān (Pakistan)1
- Biscayne National Park (Fla.)1
- Dry Tortugas National Park (Fla.)1
- Fire Island National Seashore (N.Y.)1
- Florida Keys National Marine Sanctuary (Fla.)1
- FloridaBiscayne National Park1
- FloridaDry Tortugas National Park1
- FloridaFlorida Keys National Marine Sanctuary1
- George Washington Birthplace National Monument (Va.)1
- Kitsap County (Wash.)1
- MarylandThomas Stone National Historic Site1
- MarylandWorcester County1
- New JerseySandy Hook Unit of Gateway National Recreation Area1
- New York (State)Fire Island National Seashore1
- PakistanBalochistān1
- Sandy Hook Unit of Gateway National Recreation Area (N.J.)1
- Thomas Stone National Historic Site (Md.)1