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Keystone, South Dakota, USA

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Rushmore Cave  
13622 Highway 40
Keystone, SD 57751
605-255-4384
website

Discovered by placer miners in 1876 and opened to the public in 1927, Rushmore Cave in the Black Hills is the 2nd largest cave system in the United States. Containing "the legendary big room," icicle-like stalactites, fossils, massive flowstones and spires of stalagmites, Rushmore Cave began forming 60 million years ago. Open May through October, guided tours last about one hour.

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Keystone Area Attractions

Borglum Historical Center
Keystone Historical School and Museum
Mount Rushmore National Memorial
Big Thunder Gold Mine
President's Alpine Slide
National Presidential Wax Museum
Rushmore Cave
Holy Terror Mini-Golf

 

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