The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed for four years, will be accessible again this summer. But to get in ...

Explorations of a submerged passage in the Tlayococ cave in Mexico led to an undiscovered room. Within the room, cave explorers discovered bracelets sitting atop stalagmites and other artifacts ...

A cave painting in Indonesia is the oldest such artwork in the world, dating back at least 51,200 years, according to an international team of researchers who say its narrative scene also makes it ...