El Cabrón — Gran Canaria

A day at the reserve is deliberately low-tech. Centres in Arinaga drive divers the last few minutes to a parking area above the bay, kit is carried down a short slope, and getting in means picking a line across the rocks and timing the step between sets. After that everything is walkable: routes fan out in different directions from the same short stretch of shore, so a second tank covers new ground rather than repeating the first, and two or three dives a day is the normal rhythm with no boat schedule to work around.

Underwater the coast keeps its shape. Lava ridges run seaward like fingers with sand-floored gullies between them, and the interest sits in the gaps rather than on top of the rock: corridors barely wider than a diver, arches you can line a silhouette up through, short swim-throughs that open back into daylight within a few kicks. None of it is overhead diving in any technical sense, but the walls are close and the growth on them is easily damaged, so it rewards divers who hold trim in a tight space.

The pay-off is in hours rather than headline animals. The same beach carries a first open-water profile in the morning and a longer, deeper route in the afternoon, which makes it a straightforward place to build experience and a rewarding one for photographers, who get rock architecture and small life inside a single tank. Divers who measure a trip in big animals will find it quiet. And because everything hinges on the entry, plans are made on the morning's swell forecast, with sheltered shore sites nearer the village as the fallback.