Big Thompson Canyon and Mt. Evans, Colorado
Big Thompson Canyon & Mt. Evans, Central Rockies, Colorado Explore spectacular Big Thompson Canyon and Mt. Evans, site of America's highest paved road!
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The Great Johnstown Flood, Pennsylvania 1889
The Great Johnstown Flood of 1889 Experience the scene of America's deadliest flood!
Yosemite Valley
Yosemite Valley Glaciated igneous bedrock in a massive uplift - geology doesn't get better than this!