Multi-day cave explorations may never become an activity for the masses (Photo: Getty Images) And finally, there’s the attraction of science and discovery. Steve has a background in geology ...

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 ...