Region
Mars (Planet)
471
Earth (Planet)
442
Outer space
102
Venus (Planet)
76
United States
59
Jupiter (Planet)
41
Uranus (Planet)
37
Mercury (Planet)
33
Moon
27
Solar system
26
Saturn (Planet)
20
California
9
Sun
9
Neptune (Planet)
8
Europa (Satellite)
6
Titan (Satellite)
6
Italy
5
Pluto (Dwarf planet)
5
California, Southern
4
Nevada
4
North America
4
Soviet Union
4
Arizona
3
Io (Satellite)
3
Mexico
3
Texas
3
Universe
3
Alaska
2
Alps, Italian
2
Baja California (Peninsula)
2
Candor Chasma (Mars)
2
Ceres (Dwarf planet)
2
Charon (Satellite)
2
Colorado Plateau
2
Europe, Central
2
Gibraltar Mountain Wilderness
2
Gibraltar Mountain Wilderness (Ariz.)
2
India
2
Oklahoma
2
Oregon
2
Planet Peak Wilderness
2
Planet Peak Wilderness (Ariz.)
2
Russia
2
Russia (Federation)
2
West (U.S.)
2
Africa, Southern
1
Amazonis Planitia (Mars)
1
Antarctica
1
Atlantic Ocean
1
Australia
1
more ...