The address is 425 Prewitts Knob Road.
The best way to get there is to exit I-65 at Cave City Exit 53 (KY 70/90) head South on KY 90 for about 2 miles to Prewitt’s Knob Road. The road is at the top of a hill and there is a large, historic Crystal Onyx Cave sign at the turn. Turn right and wind your way up the road for 4/10 of a mile and the Office is in the Gift shop on the left.
Do NOT follow GPS or AppleMaps directions, which will take you along US 31-W to the other end of Prewitts Knob Road. The road no longer goes across the top of the knob.
Don’t Be Confused. There is an Onyx Cave, a Mammoth Onyx Cave and a Mammoth Crystal Cave but only one Crystal Onyx Cave. Find us below the cell towers on Prewitts Knob.
Open from 11 a.m. to the last tour at 8 pm. Come and visit us!
Crystal Onyx Cave * 425 Prewitts Knob Road, Cave City, KY 42127 * (270)773-3377