Venturing alone into the depths of a remote cave is already a challenge—but what he found inside made this journey even more surreal. Hidden deep underground were mysterious blue holes, glowing eerily ...

Scientists are exploring mysterious “blue holes” that form at the bottom of the ocean off Florida’s Gulf Coast. The blue holes are underwater sinkholes that vary in size, similar to sinkholes you can ...

SARASOTA, Fla. -- A team of scientists is gearing up to explore a mysterious "blue hole" off the Gulf Coast of Florida. The National Oceanic and Atmospheric Administration described blue holes as ...

A diver’s view looking up to the opening of the seafloor hole known as Amberjack Hole, which was explored last year. Image courtesy of Mote Marine Laboratory/AJ Gonzales Tales of the ocean swallowing ...