Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above, this almost perfectly circular underwater sinkhole is a deep, dark bullseye ...

For deep reef divers, descending into the ocean’s mesophotic layer can feel like exploring the moon. Discovering never-before ...

Blue holes are worldwide attractions for amateur and professional divers alike. Here are the world's five best blue holes. Snorklers swimming over Dean´s Blue Hole with a depth of 202 meters on June ...

Jul. 28—SANTA ROSA — The Blue Hole is a mecca for New Mexicans, travelers and scuba divers. Joseph Baca, an Albuquerque resident who went to high school in Santa Rosa, said he and his family have gone ...

Diver Dominik Černý has shared footage from just outside a notorious submarine sinkhole showing a little fish cleaning the inside of his mouth. In a Reddit post, he said: "Under me were [a] few ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Sinkholes are natural depressions that form when rock ...