Krubera Cave in the republic of Georgia is currently the deepest known cave, at 7,208 feet. But Dark Star, with so many areas still to survey, is a prime candidate to take over the title.

The clever use of projectors in the room means you feel as if you are really in a dimly-lit cave, and there are animations that bring the ancient paintings to life and explain the stories behind ...

UENO, Gunma Prefecture--The Fujido limestone cave, which burrows for around 2.2 kilometers and is one of the largest in the Kanto region, has reopened featuring alternating LED lighting.