After a long trek through rugged forest terrain, we finally arrive at the entrance to a deep pit cave. The scene is already active - friends of ours are inside, maneuvering their way back up from ...

Deep inside the cave, there is a primeval forest with trees growing over 90 feet tall. Son Doong is estimated to be between two and five million years old, but no human stepped inside the cave up ...

Pluto’s Cave is a partially collapsed lava tube in the Klamath National Forest. The cave’s opening is estimated to be 10 feet high and 20 feet wide, with a depth of some 1,200 feet into the ...

While the sinkhole wasn’t a surprise finding, the primitive forest inside was. The explorers believe the three caves they discovered are remains of the early evolution of the sinkhole.

Protected by sheer cliffs, jagged mountains and limestone caves, these plants and animals ... As we walk through acres of lush forest inside the sinkhole, he points to a cliff above us.

Crystal Cave is one not to miss, according to travelers, many of whom call it a surprise highlight of their visit. The subterranean marble cavern is filled with stalactites and stalagmites. It also ...

WHICH IS SIMILAR TO THE OCEAN TO THE FOREST. THOSE ARE VERY NEGATIVE ION RICH ENVIRONMENTS, AND THEY’RE GREAT FOR OUR MENTAL HEALTH. INSIDE THE COPPER CAVE IN PLAISTOW, IT’S LIKE BEING AT THE ...

Read full article: This rotting Florida shack holds a deadly secret. Here’s the full story One of the two "Elf Houses." This one sports a myriad of holes in its dome-like roof, which allow ...

About a quarter of a mile down the south-heading trail from Arnold is another cool spot, Hidden Forest Cave, a partially collapsed lava tube with mature ponderosa pines growing from its floor.