Region
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Southern California
3
Three Affiliated Tribes of the Fort Berthold Reservation, North Dakota
3
Wales
3
West Virginia
3
Akron
2
Amazon River Region
2
Arches National Park (Utah)
2
Arrow Rock (Mo.)
2
Belfast
2
Black Hills (S.D. and Wyo.)
2
Black Rock Desert (Nev.)
2
Blowing Rock (N.C.)
2
Broadwater County
2
Brooks Range
2
Carl Sandburg Home National Historic Site (Flat Rock, N.C.)
2
Cave in Rock (Ill.)
2
Clark County
2
Colorado Plateau
2
Czech Republic
2
Dakota Formation
2
Denver Basin
2
Detroit
2
Dighton Rock
2
Dighton Rock (Mass.)
2
East Los Angeles
2
East Potomac Park Golf Course (Washington, D.C.)
2
Egypt
2
Enchanted Rock State Natural Area (Tex.)
2
Ethiopia
2
Flat Rock
2
Flat Rock (Henderson County)
2
Fremont County
2
Garrison Dam (N.D.)
2
Germany (East)
2
Germany (West)
2
Great Basin
2
Gunnison County
2
Hagerman Fossil Beds National Monument (Idaho)
2
Haight-Ashbury
2
Hanging Rock Iron Region (Ohio)
2
Hibbing (Minn.)
2
House Rock Valley
2
Illinois River Valley
2
Illinois River Valley (Ill.)
2
Indiana
2
Isle Royale National Park
2
Isle Royale National Park (Mich.)
2
Klamath Mountains
2
Klamath Mountains (Calif. and Or.)
2
Langston Golf Course and Driving Range (Washington, D.C.)
2
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