Rushmore Cave, Show cave near Mount Rushmore, South Dakota, US
The cave extends across 3,652 feet of underground passages featuring diverse limestone formations, including stalactites, stalagmites, columns, and helictites throughout multiple chambers.
Local miners discovered the cave in 1876 when a broken log flume spilled water that flowed into a small opening on the hillside.
The Post Office room contains marks left by early explorers who carved their initials, documenting the first ventures into these underground passages.
The cave maintains a temperature of 58 degrees Fahrenheit year-round, requiring visitors to bring light jackets and wear sturdy shoes for the one-hour guided tour.
The Floral Room displays natural helictite formations that create patterns resembling leaves, setting this chamber apart from others in the Black Hills region.
Location: South Dakota
GPS coordinates: 43.87450,-103.33200
Latest update: March 11, 2025 03:41
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