Unusual Pre-Civil War Abandoned Mine that Breaks into a Crystal Cavern
20:25
Abandoned Mine Exploration of the Colossal Underground Summit Copper Mine
31:12
Abandoned Mine Exploring Leads to Blue Crystal Cavern
29:04
Searching the Mountain for Historic Abandoned Mines to Explore
27:36
Exciting Historic Treasures Found in this Large Abandoned Mine!
54:59
The Mysteries of The World's Largest All-wood Trestle Bridge - The Goat Canyon Trestle Bridge
21:05
Dangerous and Unexpected Finds in Abandoned Mine: Gold, Bad Air, and Colors!
17:49
Exploring a Lost Underground Tunnel, Cave -ins, and Hidden Passages to a Massive Abandoned Mine
27:41