What an incredible history lesson here! We enjoyed learning about this place so much last week with MRV The Buzz’s editor Tim Wassberg, that we decided to do it again! What incredible history at the Louisville Mega Cavern! 100 ACRES of a Cavern with 17 miles of roads, zip lines, bike courses and so much more. What a very neat place to visit when you’re RVing in and around Louisville. In fact, the Mega Cavern is DIRECTLY under the Louisville Freeway!