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.

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.

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.

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.

This is a deep dive near the bottom of Mount Ulia, with a minimum depth of 20 meters and a vertical wall that falls down the north face to 40 meters. You will see many lobsters here, hence the name. This is an advanced dive due to the depth.

This site is parallel to the coast of Mount Ulia, formed by numerous east-west facing slabs, with a minimum depth of 14 meters and a maximum of 30. You can find several merchant anchors here.

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Immersion in one of the slabs that closes Kala Ilurgieta with west-east orientation. Started at about 8-10 m. depth at the top of the slab, up to 22-24m. where the flagstone dies on a sandy beach.