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Region
- Afghanistan33
- Mars (Planet)28
- Venus (Planet)14
- CaliforniaBig Sur Coast National Scenic Area2
- Ganymede (Satellite)2
- George Washington Birthplace National Monument (Va.)2
- Gulf Coast (Tex.)2
- Gulf Islands National Seashore (Fla. and Miss.)2
- Hawaii2
- Long Island Sound (N.Y. and Conn.)2
- Michigan, Lake2
- North Pacific Ocean2
- OregonCrater Lake2
- Port-au-Prince (Haiti)2
- Stellwagen Bank2
- Texas2
- VirginiaGeorge Washington Birthplace National Monument2
- AlaskaFish Creek Region (North Slope Borough)1
- AlaskaGlacier Bay1
- Amazonis Planitia (Mars)1