Crystal Onyx Cave. County: Barren. Address: 425 Prewitts Knob Road, Cave City, Ky. This family-owned and operated cave, located on Prewitts Knob, is one of several private caves near the national ...

Mammoth Onyx Cave. County: Hart. Address: 3700 L&N Turnpike Road, Horse Cave, Ky. This cave is part of Kentucky Down Under Adventure Zoo, located in Horse Cave.The cave was discovered in 1799 but ...

MAMMOTH CAVE, Ky. — The world's longest cave just keeps getting longer. Mammoth Cave is a national park located in southcentral Kentucky. According to the park's Facebook page, six more miles ...

U.S. researchers discovered a new shark species in rock layers at Mammoth Cave National Park in Kentucky, the National Park Service reported. On October 11, which is National Fossil Day, ...