The cave is the terminal exit point of the Riu Blanc, an underground river system extending several kilometers inland.
The interior contains a series of submerged galleries that are among the most complex cave diving sites in Spain.
The arches are primarily composed of Cretaceous limestone, making them susceptible to ongoing erosion.
The water temperature inside the cave is often lower than the surrounding Mediterranean due to the inflow of freshwater springs.
Access to the deeper, fully submerged sections of the cave system is restricted to certified cave divers due to extreme safety risks.
Cueva de los Arcos is a large, naturally formed sea cave located at the northern end of Cala del Moraig in Benitachell. It features a series of distinctive stone arches carved by persistent wave erosion into the limestone cliffs. The cave serves as the surface outlet for an extensive subterranean river system known as the Riu Blanc. Divers frequently explore the underwater passages connected to this cave, which reach significant depths. The interior floor consists of a mix of gravel and submerged pools fed by freshwater springs. Its architectural formation is the result of karstic processes acting on the coastline over geological time. The area remains accessible by foot from the adjacent pebble beach.
From the water's edge looking outward through the main arch to frame the Mediterranean sea.
Wear sturdy water shoes with good grip, as the terrain is slippery and covered in jagged rocks.
Bring a waterproof dry bag if you intend to swim into the inner parts of the cave.
Visit during low tide to maximize the amount of walkable space inside the arches.
Attempting to swim deep into the cave tunnels without specialized diving equipment and training.
Access may be restricted by local authorities during periods of heavy rainfall or high sea states for safety.
Do not climb on the delicate limestone formations to prevent erosion and personal injury.
