. . Crystal Onyx Cave . . . We're Not Mammoth, but we are Spectacular

Map to Crystal Onyx Cave

Cave area

The address is 425 Prewitt’s 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 Prewitt’s 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.

Prewitts Knob

Historic sign at KY90 and Prewitts Knob Road
This is a view of Prewitts Knob from the I-65 exit. The cave is located under the cell towers. The towers are visible for miles in all directions.

Crystal Onyx Cave * 425 Prewitt’s Knob Road, Cave City, KY 42127 * (270)773-3377