While Arizona is famous for its stunning landscapes and dramatic rock formations, some of the best things to see here are underground. Arizona has numerous famous caves — some readily open to the ...

Getting to the Apostle Islands ice caves in Wisconsin requires a multi-mile trek over the frozen surface of Lake Superior.

The painted animals in the caves of Lascaux show the artistry of people 15,000 years ago. Walking through the caves of Lascaux, under a stampede of 600 impressively painted animals covering its ...

Postojna Cave is famous for its five-metre-tall bright-white stalagmite called Brilliant. Postojna Cave, and the surrounding ...