Nature
4
The only tunnel on the Skyline Drive passes for 700 feet through Mary's Rock Mountain. It was blasted out of granite-like rock. Only 1,300,000,000 years ago this rock was still molten magma.
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ExploreHere reads historical markers out loud as you pass them: over 325,000 stories across the US. No account needed.
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Luray, Virginia · United States
