Region
- Gulf Islands National Seashore (Fla. and Miss.)3
- Lancaster County (Va.)3
- Louisiana3
- North Carolina3
- Westmoreland County (Va.)3
- York County (Va.)3
- Africa2
- Atlantic Coast (Conn.)2
- Atlantic Coast (Fla.)2
- Atlantic Coast (N.Y.)2
- Bell County (Ky.)2
- Chandeleur Islands (La.)2
- Elbert County (Ga.)2
- George Washington Birthplace National Monument (Va.)2
- Gloucester County (Va.)2
- Gulf Coast (La.)2
- Gulf Coast (Tex.)2
- HawaiiKilauea Volcano2
- Kilauea Volcano (Hawaii)2
- LouisianaChandeleur Islands2