Black Canyon of the Gunnison National Park
by Ruth Moorhead
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Olympic National Park, April 2014
by John Tangney
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Golden Spike National Historical Park – Utah
by Jerry Pillarelli
| 
Grand Teton National Park
by Steve, Katherine, and Norah
| 
Carlsbad Caverns National Park, New Mexico, USA, July 2004
by John Tangney
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TOPSAILS STATE PARK A COMMENTARY
by ravenoaks
| 
Petrified Forest National Park
by Steve, Katherine, and Norah
| 
Calero County Park At Casa Loma Entrance - 03/31/20
by mic_hong
| 
Grand Canyon National Park – North Rim – Arizona
by Jerry Pillarelli
| 
Mesa Verde National Park
by aw11mr2
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