Veteran cave diver Brian Kakuk lifts a more than 3,000-year-old Cuban crocodile skull—an animal no longer found in the ...

Explorers descended into a 500-foot-deep cave—only to find something even more mysterious below: a perfectly blue, seemingly bottomless hole. Learn what makes this rare geological formation so ...

We didn’t expect to find it - but once we saw that deep blue glow, we knew we had to investigate. Hidden far inside a remote river cave, we came across a mysterious blue hole that seemed to drop ...