The deepest free-fall pit in the lower 48 United States, the Fantastic Pit features a staggering 586 feet (179m) drop - a ...

A jungle inside a cave? A roof collapse long ago in Hang ... Stands of bamboo and other vegetation cover mounds of limestone here, making the place all but impenetrable. Below the surface, this ...

Sunlight penetrates deep inside, allowing mosses ... The sharp presidential profile is a natural feature of the limestone and one of the cave system’s many curiosities. One “day,” with ...

Hang Son Doong is the world's largest known cave, with enough space in some of its passages to fly a Boeing 747 airplane ...

The Batu Caves in Malaysia consist of three large caves, and a number of smaller ones, in a limestone hill. The 100-year-old temple inside the cave serves as an important religious landmark by Hindus.

You can tell roughly how old they are by their size. They grow about 10cm every 1000 years. The stalactites and stalagmites make these really dramatic limestone features inside caves. Look!

NAGO, Okinawa Prefecture--A treasure trove of rare limestone structures has been ... is available on the presence of beach rock inside a cave beyond the reach of sunlight, which calls into ...

They left behind petroglyphs, which you can still see today on the marine coral limestone walls ... photos are only permitted in one area inside the caves, although you're given plenty of time ...

Deep beneath the Chihuahuan Desert in southern New Mexico is a labyrinth of more than 300 limestone caves, carved over 250 million years ago. The park also preserves biologically diverse desert lands ...