Elephant Head Rock

The Similans' granite reaches its full expression here: boulders the size of houses lean into a three-dimensional maze of tunnels, arches, and shafts where sunlight drops in blades and exhaled bubbles crawl the ceilings like mercury. Navigating the swim-throughs is the dive, with white-eyed morays and painted lobster in the seams, whitetip reef sharks resting in the sand rooms, and jacks patrolling wherever the current compresses. Surge breathes through the passages even on fair days, so timing and spacing matter. Between the rocks, gorgonian stands and bannerfish soften all that geology.

您此行的高光时刻: The archipelago's best swim-through maze, light-shafted granite rooms, sharks under the arches

地形地貌: Colossal granite boulders stacked into swim-throughs over sand

水流: Currents split and funnel through the boulder passages; guides pick routes to match the day.

入水方式: Between islands 7 and 8; the granite tops show above water and boats drop divers up-current of the maze.

危险因素: Surge and current through confined passages; overhead sections and depth on the outer sand.

保育: Park rules apply; the granite is bare but the growth in its shadows is not, so watch tank slams in the passages.

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）。