Sip back and discover Egypt’s Blue Hole near Dahab, a dramatic limestone sinkhole on the Sinai Peninsula shaped by tectonic rifting and sea-level change. Explore Eocene fossil-rich limestones, Nummulites foraminifera, coral reefs, and the famous underwater arch. A world-renowned yet dangerous diving site, the Blue Hole blends geodiversity, palaeontology, and Red Sea marine life.