Darwin's Arch (Darwin's Pillars)
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.
The famous rock arch beside Darwin Island collapsed in May 2021, leaving two pillars, but the dive below never depended on the architecture. Divers drop onto a boulder platform at 12-20 m nicknamed the theater, brace against the current, and watch the eastern Pacific commute past: scalloped hammerheads in ranks, Galapagos sharks quartering the edge, turtles laboring across the flow. In the cool season the main event arrives from the blue - whale sharks, most of them enormous females, that pass the platform on patrol. The ascent drifts into open water, blue and bottomless, which is where safety-stop silkies like to make their inspection.
The moment you come for: Whale sharks June-November, walls of hammerheads, Galapagos sharks at arm's length, dolphin flybys
Topography: Sloping boulder platform ending in a drop to deep water
Current: Current sets the plan; divers wedge in behind boulders on the platform, then drift off into the blue for the ascent.
Know before you splash
Hazards: Strong current, surge over the platform, blue-water ascents far from the boat; panga pickups require a DSMB.
Conservation: Within the Galapagos Marine Reserve; no contact with the reef, and only permitted liveaboards may dive here.
Nitrox: Worth it here — profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Bottlenose Dolphin
Galápagos Shark
Green Sea Turtle
Scalloped Hammerhead
Silky Shark
Whale Shark
For photographers
Wide angle: ★★★★★ · Macro: ★☆☆☆☆ — editors' 1–5 rating of what this site gives each style of shooting