“Well, hi, hillbilly.” Kurt’s grin shone as big and bright as the sun-gold letter L on his velour turtleneck. It was his same arrogant, sneering grin as a

When his friend, Floyd Collins, becomes trapped in a cave in Kentucky in 1925, ten-year-old Arly places himself in great danger while trying to help with the re

What's more dangerous than scaling Mount Everest? For mountaineer Pete Athans, the answer lies in the ancient kingdom of Mustang, a remote part of the Asian nat

The Huautla in Mexico is the deepest cave in the Western Hemisphere, possibly the world. Shafts reach skyscraper-depths, caverns are stadium-sized, and sudden f

Narrow passages, twisting upward or dropping precipitously. Huge vaults filled with fantastic shapes. Tunnels twined in tangled mazes. Over centuries, undergrou