Las Calderas

Three large boilers from a steam vessel sit on the seabed, giving the site its name ('calderas' means boilers). Two smaller boilers near the northern end — one partially broken to reveal internal tubes colonised by spider crabs and planarian worms, the other about 4 metres tall and coated in red algae. The largest boiler further south is believed to be the vessel's original. English-made refractory bricks with factory inscriptions surface around it after winter storms.

Yes — multiple dive centres describe it as suitable for all levels. Typical depths are 10-18 metres, the mooring sits in a sheltered cove, and the wreck structures are accessible without penetration. It works well as a second dive after a deeper site or as an introduction to wreck diving. Under-hull exploration is optional and recommended only for experienced divers.

Macro photography excels here. Nudibranchs cover the wreck surfaces and surrounding rocks. Cowrie shells hide among gorgonians on nearby formations. Blue planarian worms inhabit the smaller boiler. Fireworms reach sizes described as exceptional for Europe. A torch is essential for under-hull areas and boiler interiors where lobsters with cleaner shrimp shelter.

The identity is uncertain. One dive centre identifies the wreck as the steamship Frieda, which sank in 1905 after hitting the island in fog. An academic guide suggests the debris may be from more than one vessel — possibly a steam ship loaded with scrap from other wrecks, a common salvage practice in the early 1900s. All sources agree the wreck dates to the late 19th or early 20th century.

Yes, in pairs. The hull rests on large rock blocks, creating passages underneath with three clearly illuminated exits. The underside is entirely carpeted in orange coral. Silt kicks up easily in these passages, so the option is best on days with clear water — your guide will assess conditions before including the under-hull route.