Geology - Atlas Obscura

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Nebraska National Forest

From Prairie Grasslands to Man-Made Forests: Discover Nebraska's Natural Wonders

From a subterranean network of hidden tunnels to the largest man-made forest in the country, the wonders of nature are extraordinary.
Pomona, Illinois

Pomona Natural Bridge

A natural sandstone bridge nestled within a mature forest in southern Illinois.
Jessieville, Arkansas

Coleman Mine

Crystal hunters can dig for their own stones at this DIY mine in Arkansas’ quartz belt.