Peeling back the layers of our Earth’s crust, scientists have unveiled an astonishing underground realm in the United States.

Once a secret hideout for moonshiners, Cosmic Caverns is now one of the region’s most captivating underground experiences.

For a quarter of a century, the scientific community was convinced that the paintings at Altamira Cave were nothing but ...

CAVE JUNCTION, Ore. — Oregon has no shortage of hiking trails, but one stands out for its 500 stairs, narrow passages and a ...

Over the course of 30 years, Francis Proctor, 76, with engineering advice from his wife Barbara, created a cave system six ...

A crowd gathers at a homecoming event held for previous park area residents in 1939. NPS Photo. MAMMOTH CAVE, Ky. — Mammoth Cave National Park is inviting the public to attend Echoes of the Past, an ...