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

Map to Crystal Onyx Cave

Cave area

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.

Prewitts Knob

Cave 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.

Now Open Daily

One of the most beautiful caves in Kentucky!

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