In 1925 the geological connection between Flint Ridge and Mammoth Cave was proved when dye placed in a Flint Ridge spring showed up in Echo River at Mammoth Cav

In Beyond Mammoth Cave: A Tale of Obsession in the World’s Longest Cave, James D. Borden and Roger W. Brucker provide gripping first-person accounts of the di

“Heart-stopping and relentlessly gripping. Tabor takes us on an odyssey into unfathomable worlds beneath us, and into the hearts of rare explorers who will do

The dramatic story of several generations of cavers whose exciting and dangerous explorations in Kentucky's limestone labyrinths culminated in the big connectio