Cala Viuda

The boat anchors in a sheltered cove between limestone cliffs. Below, a series of openings in the rock lead into what the Generalitat de Catalunya describes as one of the finest submarine cave complexes on the Catalan coast. The system runs to 200 m of interconnected passages, with three chambers where you can surface and breathe.

Most guided dives pick a route through two or three chambers. The first entrance leads into a wide cavern with natural light filtering through the opening behind you. From there, narrower passages branch off, some leading to air chambers with low rock ceilings, others descending briefly before opening into the next section. Sponges coat the walls in patches of orange and yellow. Conger eels watch from crevices in the rock.

The sheer extent of the system sets Cala Viuda apart. The Medes caves are spectacular tunnels, but each is essentially a single swim-through. Here the routes branch and reconnect. Three separate air chambers give natural rest points where you surface inside the rock. The depth stays shallow, mostly between 3 and 8 m, which keeps bottom time generous and decompression out of the equation.

A guide is essential. The park authorities recommend one for anyone wanting to explore the full complex, and the multiple route options make it easy to lose orientation without local knowledge. The park's responsible diving guidelines apply here: enter caves in small groups, minimise time inside to protect ceiling organisms from air bubbles, and avoid stirring sediment with careless fin kicks. The cave entry points are on the outer coast, so a boat is the only practical access.