A secret tunnel, a hidden sea cave, and a history full of smugglers—Sunny Jim’s Sea Cave in La Jolla, California, is unlike ...

Deep inside Kanohina, hundreds of yards from ... of Hawaii’s lava tubes have been mapped. “The deep sea, outer space, and caves: Those are the only frontiers left,” says Coons, who does ...

From crystal-clear waters to amazing rock formations, cave swimming is an adventure that is both thrilling and peaceful. Here ...

With high carbon dioxide, low oxygen and no photosynthesis, here’s how an entire ecosystem persists in Movile Cave, one of the most extreme environments on Earth.

Tonya Russell Named for its sea anemones, Animal Flower Cave is the island's only accessible sea cave, located under the North Point cliffs in Saint Lucy parish. Although it's not as popular as ...