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 ...

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. I am cold and ...

If one thing’s clear from Jill Heinerth’s breathtaking new memoir on her life as a professional cave diver, it’s that this unusual career path requires serious mettle. Self portrait under the tannic ...

Divers mapping and exploring Missouri’s Roaring River Spring reached 344 feet deep during a recent dive. Screengrab/Roaring River The Abyss on YouTube Until recently, “the bottom” of a Missouri spring ...

Correction: A previous version of this article referred to the non-profit organization Karst Underwater Research as "Karst Underground Research" in one instance. This has been corrected. A group of ...

When Natalie Gibb emerges from one of her cave dives on the southeast coast of Mexico, the 41-year-old woman could easily be mistaken for a swamp monster. “I’m dripping with microbial goo and reeking ...

Jill Heinerth's Into the Planet starts with the world-renowned cave diver almost dying while being one of the first humans to search for caves inside the B-15 iceberg, the largest moving object on ...

Extreme explorers attempt the deepest underwater body recovery in history. March 19, 2007 — -- Bushman's Hole, on the edge of the Kalahari Desert in South Africa, is one of the strangest places ...

Ever dreamed of diving into crystal-clear freshwater caverns, surrounded by ancient rock formations and shafts of sunlight piercing the depths? If you’re curious about Mexico’s famous cenotes and want ...