A recent study discovered the deepest blue hole in the world-the Taam Ja' Blue Hole, located in Mexico's Chetumal Bay.
About Taam Ja' Blue Hole
Mexico's Taam Ja' Blue Hole is the deepest known underwater sinkhole in the world.
Depth: 1,380 feet (420 meters) below the surface.
It outshines the previous record holder, the Sansha Yongle Blue Hole (Dragon Hole) in the South China Sea, by 480 feet.
Fact Box: Blue Hole (Karst Formations)
Blue holes are also known as sinkholes.
They are vertical caverns filled with water that are found in coastal areas where the bedrock is composed of soluble materials like gypsum, limestone, or marble.
Examples: Great Blue Hole in Belize, the Bahamas' Dean's Blue Hole, and Egypt's Dahab Blue Hole.