Tucked beneath a historic La Jolla shop lies Sunny Jim’s Sea Cave—California’s only sea cave accessible by land. With a ...

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed ...

As night fell across northern Thailand, a 1-foot-long creature emerged from its hiding place and climbed along the rocks. Its “golden yellow” eyes scanned the surrounding forest, but it wasn’t the ...

The earliest Greek cave art depicting extinct animals was discovered on Crete and is believed to be at least 11,000 years old ...