The Bells is a well-known dive site just north of Dahab's Blue Hole, named for the narrow chimney-like entry that drops divers into the reef wall. It is a more specialized stop than a beach viewpoint, but for qualified divers it is one of the area's memorable underwater experiences.
Conditions and experience level matter here, so it should be approached with a reputable local operator. Non-divers may find the coastal setting interesting, but the real value is below the surface.