Visit the Black Hills Caves

The Jewel Cave in the Black Hills Caves of South Dakota is the third longest cave in the world and contains over 200 miles of explored passageways.

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Ranked #26 in Natural Wonders (USA)

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Black Hills

The Black Hills are a small, isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, USA. Harney Peak, which rises to 7,244 feet (2,208 m), is the range's highest summit. The Black Hills encompass the Black Hills National Forest and are home to the tallest peaks of continental North America east of the Rockies. The name "Black Hills" is a translation of the Lakota Pahá Sápa.

This description uses material from the Wikipedia article on Black Hills and is licensed under the Creative Commons Attribution-ShareAlike License (view authors).