Pedras Secas
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.
Pedras Secas - the dry rocks, for the tips that break the surface - hides Noronha's best architecture below the waterline: a maze of canyons and honest swim-throughs bored through volcanic rock, wide enough to fly with light streaming in at both ends. Green turtles hold in the passages like parked traffic, nurse sharks wedge under the ledges, and reef sharks circuit the outer walls. Eagle rays cross the sand gaps between formations. With 30 m visibility the whole site reads at a glance, which makes the navigation feel like play rather than work. It is the dive Noronha regulars take visitors to first, and the one they request again on the last day.
The moment you come for: Canyon and tunnel swim-throughs in glass-clear water, turtles in the passages
Topography: Volcanic rock formations cut by canyons, tunnels, and swim-throughs
Know before you splash
Hazards: Surge through the passages when swell wraps the island.
Conservation: Marine park rules: no gloves, no contact, distance from turtles enforced by guides.
Who you'll meet
Caribbean Reef Shark
Green Sea Turtle
Hawksbill Turtle
Nurse Shark
Spotted Eagle Ray
For photographers
Wide angle: ★★★★★ · Macro: ★★☆☆☆ — editors' 1–5 rating of what this site gives each style of shooting