"It was the deepest, deep blue hole imaginable." Some 15,000 years ago, rising sea levels sent water pouring into a limestone ...
Belize’s Great Blue Hole descends through a coral atoll into dark, oxygen-poor water. A 2018 submersible expedition reported ...
The Great Blue Hole is a giant marine sinkhole in the Caribbean off the coast of Belize that has left tourists and scientists awe-struck. Stretching 318 metres across and 124 metres deep, it is one of ...