There are miles of them scattered across Southwest Idaho, caves hidden deep beneath the earth.

The entrance to the unique Phong Nha Cave system in central Vietnam Phong Nha Cave, also known as Troc Cave, is a treasure of nature and a natural wonder.

Cave rescue experts were flown to a Lake District crag to free a woman who was trapped for eight hours.

The 33-year-old climber got her kneed jammed in a fissure on Gimmer Crag in Great Langdale about 12.30pm on Tuesday. Attempts by Langdale-Ambleside Mountain Rescue Team to free the woman were unsuccessful, and specialists from the Cave Rescue Organisation were called to help.

Altınbeşik Cave in Antalya's İbradi district, which has potential to become a very significant nature tourism spot with its charming beauty, has been unable to draw tourists for the past 15 years due the lack of a development plan. Recently projects have been launched to make the cave and its environs more accessible to tourists.

Even before the caves in Meghalaya can reveal clues to climate change, rampant mining is destroying their wealth.

An inquest into the death of a man on a cave expedition in Thailand has been hampered by a lack of "detailed information", a coroner has said.

John Cullen, 24, from Solihull, was among eight people who died when a cave flooded on 13 October 2007.

The U.S. Department of Energy awarded $126.6 million in grants on Tuesday to test carbon capture and storage in underground caverns.

A mysterious disease called "white-nose syndrome" is striking down hibernating bat populations in New York State.

France has reopened a labyrinth of medieval quarries under the northern town of Arras which the British army converted into an underground hideout for 24,000 soldiers during World War I.