Blue Holes

Four openings in the reef top drop into a single vaulted chamber the size of a cathedral nave, where descending divers watch their own bubbles rise through columns of blue light. The cavern's windows exit onto the outer wall around 25–30 m, and most dives drift from there along the reef toward Blue Corner, collecting sharks and turtles on the way. A side chamber known as the Temple of Doom holds the bones of turtles that lost their way; it is a genuine cave, silty and dark, and belongs only to trained cave divers with local guides.

您此行的高光时刻: Light shafts through the skylights; the arched exits onto the wall; the drift continuation to Blue Corner on the right tide.

地形地貌: Limestone cavern with sand and rubble floor, opening through arches onto the outer wall

水流: Sheltered inside; current picks up on exiting the wall toward Blue Corner.

入水方式: Drop through one of four skylights in the reef flat — a few meters deep — into the shared cavern below.

危险因素: Overhead environment by geometry even where light remains visible; do not enter the Temple of Doom side cave without cave training and a guide.

保育: Buoyancy discipline protects both the cavern walls and the divers below you in the light column.

高氧（Nitrox）: 在此值得使用——各潜点深度落在富氧空气（nitrox）能有效延长免减压时间的区间（前提是持有相应认证）。