Blue Hole

Dahab's famous sinkhole is really two dive sites sharing an address. The one most people do is lovely and undemanding: drop through the Bells chimney, drift south along an outer wall stepped with coral, and glide over the shallow saddle into the sunlit bowl. The other - the Arch, a roughly 26-meter tunnel through the reef wall with its ceiling near 55 meters - belongs to technical diving, and the site's grim reputation was earned almost entirely by people who attempted it without the training, gas, or support it requires. No official count exists; conservative estimates put the deaths well past one hundred, and memorial plaques line the cliff above the entry. Dived within limits, it is a calm, current-free pleasure. The shaft itself bottoms out somewhere between about 92 and 120 meters depending on the survey.

바로 그 순간: The Bells chimney entry; the saddle crossing into blue light; freediving culture at the surface; sobering memorial wall ashore.

지형: A collapsed circular shaft in the fringing reef, its floor far below recreational depths, ringed by living coral walls

진입: The classic dive enters at the Bells, a narrow chimney north of the hole, follows the outer wall south, and crosses the saddle at about 7 meters into the hole itself. Proof of certification is checked.

위험 요소: The Arch has killed experienced divers as well as reckless ones - depth, narcosis, and a deceptive exit; freedivers and scuba traffic share the bowl; midday snorkeler crowds.

허가증 & 규정: Protectorate entry fee; guides and proof of certification required, with technical dives subject to additional checks.

보존: Inside the Ras Abu Galum protectorate; entry tickets fund management. The saddle's corals take heavy traffic - keep fins up.

나이트록스: 여기서는 가치 있습니다 — 수치 범위상 나이트록스를 사용하면 무감압 시간을 의미 있게 연장할 수 있습니다(단, 관련 교육 이수 필요).