This dive site features the historic wreck of the “Cañonero Tajo” from the Third Carlist War, lying along the northern part of a wall. Divers typically descend along this wall, exploring the remains of the ship and the thriving marine ecosystem around it. The combination of a wall and a wreck provides an interesting topography for navigation and exploration, making it a unique dive experience.
The site is home to a diverse array of marine life. Divers can expect to encounter schools of jacks, triggerfishes, and breams. For those with a keen eye for macro life, there are conger eels, spider crabs, lobsters, and various nudibranchs. Octopuses, cuttlefish, sole, and scrapie are also commonly sighted, adding to the rich biodiversity of the area.
The Cañonero el Tajo is an excellent year-round dive, with the warmer months typically offering the best visibility and water temperatures, although the temperate waters of the Bay of Biscay can be enjoyed with appropriate thermal protection at any time. It's suitable for both scuba divers and freedivers, with the average depth of 12 meters allowing for extended bottom times and easy access to the shallower parts of the wreck and wall. Divers should focus on buoyancy control near the wreck to avoid disturbing marine life and historical artifacts.

