20:30

We Pumped 60,000 Gallons Out of a Flooded Cave System

17:45

Massive Waterfall Drops 140ft Into the Earth

17:24

Floating Into a Miles Deep Cave on an Air Mattress

16:56

5 Entered This Hole. Only 2 Reached The Bottom.

16:45

The Most Incredible Crystal Formation Room I've Ever Seen

19:25

Huge Crystal Discovery Deep in a River Cave

20:03

Secret Cave at the Bottom of a Rat Infested Hole

27:07

Homeowner Finds Massive Cave Beneath His House

24:33

Glowing Crystals Inside a Locked Up Cave

24:01

Roadside Cave Full of Ancient Pearls and 300M Year Old Fossils

25:08

Friend Stuck on a Dangerous Ledge in a River Cave

17:18

200ft Hole Next to a Hiking Trail Got Us Sick...

26:35

We Had to Come Back With More Ropes

28:51

200ft Hole Behind a 911 Center with Bones Inside (Part 2)

28:47

Hidden Cave Pools Leading to a Crazy 280ft Waterfall

23:48

150ft Hole Leads to Secret River Cave with Giant Catfish

23:46

Cathedral of Formations Hidden 500ft Underground

19:47

Native American Bones Found in a Sinkhole

41:05

180ft Pit Drops into a Cave From Hell

27:39

Gated Cave Full of Crystals and 300M Year Old Fossils

32:23

Cave Above Waterfall With Unexpected Life Inside

25:51

Weather Takes a Dangerous Turn While Inside a Flooded Cave

36:39

Inside the Biggest Underground Chamber Ever Discovered

27:49

The Biggest Underground River Passage I Have Ever Seen

26:04

200ft Deep Hole Behind 911 Center with Bones Inside

23:32

Underground River Leads to Breathtaking Sights

19:45

This Ancient Cave was Sealed by the Federal Government

19:16

Collapsing Tunnel Into a Flooded Hollow Mountain

13:56

Homeowner Leads Us to a Huge Cave Discovery

21:43

Collapsing Cave Breakdown is the Only Way Out

10:06

170ft Hole Leads to Awesome Humming Formations

13:23

New Cave Found While Searching Hillside Holes

22:50

Homeowner Finds Fossil Rich Cave Under Front Yard

17:51

The Emerald Pool of Petty Johns Cave

16:18

Homeowner Dug Open a Huge Cave In His Backyard

28:52

Complex Cave Leads to Underground Lake

16:28

220ft Hole Leads to Incredible Flowing Formations

24:44

Secret Elevator Inside a Cave Full of History

19:22

Unexplained Voice Heard in Eerie Bat Filled Cave

20:12

My Terrifying Experience Getting Stuck in a Cave

35:15

Majestic Formations Deep in a River Cave

23:24

To the Edge of the Deepest Pit in America