This dive site, Arcos dal Calhetas, is located a short 14-minute boat ride from shore and is a geological marvel known for its impressive volcanic rock formations. Divers navigate through a network of lava tubes, featuring multiple passages and entrances, creating an exciting underwater labyrinth. While no specific historical context is provided, these formations are a natural result of past volcanic activity, offering a unique and dynamic underwater landscape to explore.
Beneath the surface, the site teems with a variety of marine life, particularly smaller species thriving within the protection of the lava tubes and crevices. Divers can expect to encounter rock goby, cardinalfish, and the vibrant swallowtail seaperch. Moray eels, including the Mediterranean and fangtooth varieties, are often spotted, along with different pufferfish species like the sharpnose puffer. Conger eels, spotted rocklings, and forkbeard also inhabit this rich ecosystem.
Arcos dal Calhetas is suitable for diving year-round, though the warmer months typically offer the best visibility and water temperatures. The maximum depth of 18 meters and average depth of 9 meters make it accessible for both recreational divers and freedivers looking to explore the shallower sections of the tubes. Divers should be mindful of good buoyancy control when navigating the passages to protect the delicate environment and ensure a safe and enjoyable experience.

