U.S. Geography

What Kentucky attraction is the world's longest cave?

More Questions from U.S. Geography
What is the Riverwalk called along the banks of the Des Moines River in Des Moines, Iowa?
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What is the capital of Texas?
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What bridge connects Washington, D.C. to Arlington National Cemetery?
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The state of Arizona is located in which U.S. region?
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What hurricane struck southeastern Louisiana in late August of 2005?
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Which coast of Florida has the most lighthouses?
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Located in Nevada, what was the highest concrete dam in the world when it was built?
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Which American state is known as the "Volunteer State"?
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