Blue Hole - Dahab

The Blue Hole is a diving location on the southeast Sinai, a few kilometres north of Dahab, Egypt on the coast of the Red Sea.

The Blue Hole is a submarine sinkhole, with a maximum depth within the hole of just over 100 m (328 feet). There is a shallow opening to the sea around 6 m (20 feet) deep, known as "the saddle", and a 26 m (85 feet) long tunnel, known as "the arch", whose top is at a depth of 55 m (181 feet)^[1], and whose bottom falls away as it reaches the seaward side to about 120 m (394 feet).^[2] On the seaward side the depth drops steeply to over a thousand metres (3500 feet) deep.
[3] The hole and the surrounding area have an abundance of coral and reef fish.^[3] The Blue Hole is a hot spot for freediving because of the depth directly accessible from shore and the lack of current.