This lagoon complex is a large pool of water that constantly receives water from the springs through waterfalls and also from underground water. Its banks are alive with reeds and low scrub, so entry is possible from any point. The bottom is generally sand in the form of heavy mud.

On the southern breakwater of Castro-Urdiales harbor, we find an easy yet lively dive. The mix of breakwater rocks and sandy bottoms creates an ideal environment to observe a wide variety of fish, cephalopods, and crustaceans. It is a very popular area among divers and perfect for night dives.

About 25 minutes from Viseu, we find the dam with a maximum depth of 20 meters and an interesting underwater route with a maximum depth of 9 meters. On-site we can find a bus, a horizontal tunnel passage, a small sailboat, a construction silo, 2 light cars, and 1 jet plane

Also known as Ostende Bay, this dive begins from the artificial beach and follows a calm landscape where sandy bottoms alternate with rocky formations that create natural corridors. It is ideal for try-dives, courses, and night dives, as each corner changes with the light and reveals something new.

Next to the Luchana cliffs lies Rabbit Island, a dive site with a rocky seabed, small caves, and channels ideal for exploration. Currents are usually mild, although at certain times of the year they can intensify.

Northwest of Castro Urdiales Bay, this shore dive explores remains of the mining past. Large anchors mark the old ore loading dock. With a maximum depth of 12 m and no usual currents, it is an accessible site, ideal for beginner divers.

The Sonabia Whale is a dive site reached by boat. With depths from 6 to over 20 m, it offers rocky corridors and formations. A protected area with rich marine life, mild currents, and low–medium difficulty, making it ideal for divers of all levels.

Archipelago of islands in front of Cuchia in Miengo, offers us all the varieties that diving offers us. From dives for OWD, as well as for the most advanced; exploration and life control dives.

Remains of old sunken pontoon constructions next to an outfall that is lost in the sea. The outfall supports give an eerie look on dives rising from the sea floor to support a huge endless pipe. Fantastic place for night dives with lots of life

This site has a huge wall with an east-west orientation and a ridge about 3-5m deep, falling to 30-32m on the north face. The south face is slightly shallower and descends to 25-26m.