The intricate cave system perched deep in an isolated stretch of Spanish mountains contained the remains of an ancient and ...

In the dank depths of Ellison’s Cave, you can find two of the deepest freefall pits in mainland US: Fantastic Pit, which plunges vertically for 179 meters (586 feet); and Incredible Pit ...

The cave, located in the separatist region of Abkhazia ... But finally, on October 19, Kasjan dropped down a pit later dubbed Millennium and looked at his altimeter. He had passed the 2,000 ...

More information: Leonardo Carrer et al, Radar evidence of an accessible cave conduit on the Moon below the Mare Tranquillitatis pit, Nature Astronomy (2024). DOI: 10.1038/s41550-024-02302-y ...

With a depth of around 2,199 metres, a cave in Georgia is so deep that nearly seven Eiffel Towers could fit inside.

Down a swaying rope into a black, hot pit, 1,350 ft. below the earth’s surface ... into the unmeasured depths of the Carlsbad Cave in the Guadalupe Mountains in lower New Mexico.