This cave system remains a cool 54 degrees throughout the year making it a nice spot any season. This cavern was probably formed a few hundred million years ago. Now you can experience the result of that unimaginable amount of time. The Natural Wonder Tour takes you through the Mingo Valley and into the cave via a sinkhole. You'll get to see the crystal-white stalactites and stalagmites. Like any respectable cave, you can mine for gems and stones for an additional fee.