7 hr 12 min (434 miles)
via US-31 and I-65 S
37.1862° N, 86.1000° W
Mammoth Cave National Park is an American <a href="https://en.wikipedia.org/wiki/National_park" title="National park">national park</a> in west-central <a href="https://en.wikipedia.org/wiki/Kentucky" title="Kentucky">Kentucky</a>, encompassing portions of Mammoth Cave, the <a href="https://en.wikipedia.org/wiki/List_of_longest_caves" title="List of longest caves">longest cave system known in the world</a>.
Day 1 - Starts here

A Mammoth Series : Day 2 ( About and Around Cave City , KY )

The Most Interesting Podcast in the World was a campaign for The Maybe Matthew Podcast. The Podast features a bearded, debonair gentleman with conversations that are stimulating , informative and enjoyable. 

Including but not limited to -