The Caves at Norman Island
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.
Norman Island has fed treasure stories since the eighteenth century, reputedly seeding Stevenson's Treasure Island, and its three sea caves at Treasure Point keep the myth in working order. The caverns run back into the cliff at swimming depth, ceilings flickering with reflected light, walls dabbed with orange cup corals and sponges, and glassy sweepers pulsing in the dim inner rooms. Outside, the fringing reef slopes gently past parrotfish and angelfish territory. Most visitors snorkel it from charter boats; divers get the best of it early, before the day fleet arrives, poking lights into the recesses.
The moment you come for: Swimmable treasure-lore caves, sweeper-filled inner chambers, easy reef outside
Topography: Rock shoreline with three shallow sea caves and fringing reef
Entry: Moorings off Treasure Point; the caves themselves are snorkel-depth at the entrances.
Know before you splash
Hazards: Snorkeler and dinghy congestion at midday; gentle surge inside the caves on swell.
Permits & rules: National Parks Trust moorings; permits handled by operators and charter companies.
Who you'll meet
Christmas Tree Worm
Great Barracuda
Hawksbill Turtle
Porcupinefish
For photographers
Wide angle: ★★★★☆ · Macro: ★★☆☆☆ — editors' 1–5 rating of what this site gives each style of shooting