Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

While precious summer hours are slowly ticking away, fall-like weather may be nice enough to get outside on the weekends for weeks yet. In case you weren't paying attention, fall returns on Sept. 22.

Caves can be thought of as nature’s original prefabricated homes. Here are five animal species that choose to live in them. While the image of early humans huddled in caves has become an almost ...

As soon as we entered the dense woods on a torrid, humid day, we were immediately enveloped in cool air. The refreshing breeze wafted upward as we descended into a deep hole. Soon we ducked ...