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PHOTO: A cave opening in the Karst region of Slovenia. (photo by Gary Crow) Who said all the fun has to be had above ground? Slovenia's Karst region is home to a fascinating underground world, ...

A tourism brochure for New Zealand's Waitomo Caves from 1928 What’s waiting for us within the mysterious depths of a cave? It’s been the stuff of legend and campfire stories for centuries.

Slovenia is a hiker's paradise. In this small country, you will find over 10,000 km (6,200 miles) of hiking trails.

Here is my personal countdown, in no particular order, of the best things I did while on a trip to Slovenia. Postojna Caves are one of the longest cave networks in Europe, measuring at 24.34 km ...

Cenotes in the Yucatán Peninsula are time capsules preserving remnants of Maya culture and fossils of extinct megafauna Martin Broen Freelance writer The underwater caves of the Yucatán ...

Arizona has numerous famous caves — some readily open to the public, some not. Some, like Kartchner Caverns, are renowned for their stunning beauty, filled with awe-inspiring formations that ...