World's Most Stunning Sinkholes

The Sinai Blue Hole (Dahab)

A popular (and dangerous) diving site on east Sinai on the coast of the Red Sea a few miles north of the small town of Dahab, The Sinai Blue Hole is a submarine sinkhole which is around 130m deep. The sink hole is renowned for scuba attempts and free-diving, while the surrounding area has an abundance of corals and reef fish. However, it is also renowned for its danger and has been labeled “the World’s most dangerous dive site”.