Pedra da Greta

Pedra da Greta's stone blocks rise like a low limestone maze, twenty to forty metres wide and barely more than a metre and a half tall, running in a single line parallel to the Faro shoreline. Divers thread the sand-filled channels between the blocks, following the same line the reef itself runs, so navigation stays simple even without a marked route. Depth ranges from about fourteen metres, where the average diver settles, up to the recorded maximum of eighteen metres, and current stays low enough, under a knot, that most of the dive time goes into working the cracks. Sponges and anemones crowd the ravines between blocks, moray eels hold the deeper holes, and a wide variety of nudibranchs work the rock surfaces closely enough that photographers slow right down.

The rock here comes in blocks large enough to form real crevices, and those crevices hold plenty of soft-bodied life: two named gorgonian species, the white sea fan (Eunicella gazella) and the orange gorgonian (Leptogorgia sarmentosa), have been recorded fanning out from the cracks between blocks, alongside seabream, sea bass, sponges and anemones in a range of colours and shapes. The site sits close to Faro's sheltered, barrier-island coast, away from the swell that runs along the Algarve's more exposed western stretches, so current here stays close to nothing even when the open coast is running. Visibility stays only medium, five to ten metres, but it holds steady through the year instead of swinging with the weather.

Open Water certification covers the whole dive: recorded depths sit within Open Water no-decompression limits, and the site's listed minimum experience is CMAS one-star or Open Water equivalent. Portugal Dive, a Portugal-wide dive-trip booking agency, lists Pedra da Greta among its bookable Algarve dives; ask about departure point and timing when you enquire, since boat time from the Faro area runs under thirty minutes. Bring a torch if you want to work the crevices for nudibranchs; the medium visibility and low current make this a dive worth slowing down on.