Blue Hole, Submarine sinkhole in South Sinai Governorate, Egypt.
The Blue Hole is a circular underwater opening along the Red Sea coast that drops away from a shallow entry point. A tunnel connects the inner chamber to the open ocean and runs beneath the reef edge.
Israeli divers began exploring this formation in 1968 during the occupation of the peninsula. After the peace treaty in 1979 the site developed into a world-known diving destination under Egyptian administration.
Bedouin communities once avoided this site because they considered it a dangerous abyss. Today international divers and local guides gather along the shore to discuss their underwater explorations and share experiences with one another.
Several dive centers nearby offer trips for beginners and experienced divers with separate entry points depending on skill. The shallow area works for snorkeling while deeper dives require preparation and guidance.
On the seaward side the wall drops away beyond 1000 meters and forms a dark blue backdrop behind the coral. Schools of small fish move along this edge while larger species emerge from the depth below.
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