TUCSON, Ariz. — For hundreds of thousand of years the caves in the limestone foothills of the Whetstone Mountains remained undiscovered. That all changed in November of 1974. Randy Tufts and his ...

Slovenia is home to some of the most amazing limestone caves in the world, which are a treat for nature lovers and adventure ...

The most common process by which limestone caves form involves carbonic acid — or weakly acidic groundwater — as the primary agent. When carbonic acid contacts limestone, it dissolves minerals in the ...

Let’s say you’re on the way to Needles. Alright, you’re probably not on your way to Needles. But say you’re headed to Las Vegas or Lake Havasu, and you’re looking for a fascinating stop along the way.

STORY: Visitors can watch the story told in 16 scenes strung along five kilometers (3.1 miles) underground in Postojna Cave in Slovenia's south-west. The tradition of living nativity scenes started in ...

Madagascar is home to some of the world's most unique limestone caves, which are a must-visit for caving enthusiasts ...