Great Onyx Cave, Show cave in Mammoth Cave National Park, Kentucky, US
The cave network features elaborate mineral formations, including calcite deposits, cave coral structures, and a 40-foot limestone column along its passages.
The cave system, situated within Mammoth Cave National Park, became a tourist destination in the late twentieth century following its discovery in 1971.
The cave formations reflect Kentucky's geological heritage, with extensive limestone passages shaped by water erosion over millions of years.
Guided tours lasting 30 minutes allow visitors to explore the underground passages while maintaining a constant temperature of 54 degrees Fahrenheit throughout the year.
The cave contains a distinctive natural feature called the waterfall wall, where mineral deposits create patterns that mirror the appearance of frozen cascades.
Location: Kentucky
GPS coordinates: 37.21861,-86.07889
Latest update: March 9, 2025 08:35
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