The blue hole, maybe Dahab’s most renowned sight, is essentially a massive hole in the Red Sea. From the air, it appears like a dark blue circle in the water. This is a popular dive location, however it is also an extremely hazardous dive site. The risk arises from the temptation of “the arch,” a passage in the wall of the blue hole that links it to the open sea. Many divers, even skilled divers, visit the location and are unable to resist the desire to discover and travel through the tunnel. As a result, many individuals have perished there. Overall, it’s an intriguing spot to see and dive, but don’t try the arch!