For divers who are looking for a bit more adventure and some slightly different scenery, there is nothing better than a blue hole. These holes are naturally occurring vertical caves or sinkholes. The holes, which are filled with water, can occur on land, but are more common in ocean areas. These holes can be found around the world, but a few of these holes are a bit more exciting than the others.
Great Blue Hole – Belize
The world’s most famous ocean hole is the Great Blue Hole in Belize. When seen from above, this hole appears almost perfectly circular, and the water is a deep sapphire blue color, much darker than the surrounding ocean. This hole is about 984 feet across, and is 407 feet deep. This particular hole is popular with divers who are interested in viewing the cave’s amazing underwater stalagmites and stalactites.
Dean’s Blue Hole – Bahamas
Another famous hole is Dean’s Blue Hole, which is located just west of Long Island in the Bahamas. This hole is also roughly circular, and is between 82 and 115 feet across. The hole’s diameter widens after about 66 feet down. The hole is the deepest saltwater filled hole in the world. It is about 663 feet deep in total.
Blue Hole – Red Sea
The Blue Hole of the Red Sea is an infamous hole, mostly known for the number of divers who have experienced severe accidents while exploring the hole. This hole, which is off the coast of Dahab, Egypt, is about 427 feet deep. At a depth of about 171, a tunnel cuts into the hole. Many divers attempt to reach this tunnel, even though it is deeper than the recreational diving limit. For this reason, many accidents occur, and the hole is often referred to as the world’s most dangerous diving site.
Blue Hole – Gozo, Malta
Another famous hole is Malta’s Blue Hole, which is located near the island of Gozo. This hole is notable for both the surrounding scenery, including a famous natural arch, as well as the many coral and fish, including tuna and barracuda, which can be seen in the hole. This hole is only about 180 feet deep.
Lost Ocean Blue Hole – Nassau, Bahamas
Yet another hole is the Lost Ocean Hole, which is located off the coast of the city of Nassau in the Bahamas. This hole is about 300 feet deep and about 80 feet across. This hole is popular with divers due to the abundance of reef sharks, angelfish and rays.