Cathedral

Cathedral is Aliwal's set-piece: a sunken amphitheater roofed at one end by a broad rock arch, with a clean sand floor that lets divers kneel in the nave while the congregation arrives. In season, ragged-tooth sharks cruise beneath the arch and stack up in the still water — the classic Aliwal photograph is a raggie silhouetted in the arch's frame. Out of season the architecture still earns the visit: soldierfish and sweepers under the roof, potato bass making inspections, rays on the sand, and the shoal's endless nudibranch inventory on the walls. Surge management is the only real skill required.

Khoảnh khắc bạn đến vì nó: The arch-framed raggie silhouette; a natural amphitheater made for wide lenses

Địa hình: Sandstone amphitheater with a large natural arch and sand floor

Dòng chảy: Swell-driven surge moves through the arch on bigger days; calm windows make the amphitheater easy.

Nguy hiểm cần lưu ý: Surge through the arch and depth on the seaward side.

Giấy phép & quy định: Aliwal Shoal MPA permit required, arranged via operators.

Bảo tồn: Sand-kneeling only, and never under a shark's swim line — exits must stay open for the animals.

Nitrox: Đáng dùng ở đây — các hồ sơ nằm trong khoảng độ sâu mà nitrox có thể kéo dài thời gian không dừng một cách thực sự có ý nghĩa (khi đã được đào tạo sử dụng).