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Soon after the cave’s discovery in 1960, prehistoric human remains were found in the bottom of one of Crystal Onyx Cave’s many vertical shafts. Archeologists have since determined that the cave was used as a “mortuary facility” where native Americans over 3,000 years ago returned the bones of their deceased to the earth. The 1 hour guided tour also provides viewing of the rich assortment of calcite decorations found throughout the route, including a room filled with some of the largest viewable rimstone dams in the area. Open all year except January. Hours: June 1 - August 1 8:00 am - 6:00 pm. All others 9:00 am - 5:00 pm. After hour groups by reservation. From I-65 take exit 53, 2 1/2 miles E. of Cave City on Hwy 90. For more information, call (270) 773-2359 or
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Once connected to the nearby highlands of the Mammoth Cave Plateau, Prewitt’s Knob today stands out like an island in the surrounding farmland of the sinkhole plain. Sheltered beneath the knob’s resistant cap rock, is Crystal Onyx Cave, one of south-central Kentucky’s most important archeological sites and a formation rich
cave.