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.
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.
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.
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.
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.