Nature never stops to amaze us with its magnificent phenomenon just like these inexplicable holes in the ground. These holes may be formed gradually or suddenly, and are found worldwide. This is a list of beautiful natural holes from around the World, which have become popular tourist destinations.

Dean's Blue Hole, Bahamas
Dean's Blue Hole is the world's deepest known blue hole with seawater. It plunges 202 metres (663 ft) in a bay west of Clarence Town on Long Island, Bahamas.

Dean's Blue Hole is named after the family name of local landowners. It is located in a small bay, divided from the open sea with small peninsula. Over the last few years this sinkhole has become a scene of world-class free-diving.