The underwater path is suitable for divers of level medium. Start from the inside of the Cova dels Arcs. In a journey to the South will discover a characteristic rocky seabed where the play of daylight offered a special attraction to dip. Following to the vertical wall of the cliff observing sea grass, the route culminates in a beautiful cave or Gallery. At this point, we will be in the area where sea water meets fresh water of the Riu Blanc or Moraig Riu, where access is restricted to highly skilled cavers with knowledge of the cave, for its high degree of danger.
La ruta está orientada hacia levante y por las mañanas el sol es muy intenso. En verano es aconsejable hacer la ruta por la tarde, o iniciarla nada más despuntar el sol, pasar el día en la cala de Llebeig y regresar por la tarde cuando haya sombra por todo el camino.
La ruta tiene dificultad en el tramo de bajada a la cala del Llebeig (y su posterior subida). Hasta ese tramo puede realizarse con niños.
Duration approximate: 45 minutes
Depth maximum: -13m
Lugar de inicio: el interior de la Cova dels Arcs, en la playa del Moraig.
The course start in the Cova dels Arcs. We let ourselves fall into the mouth of the pond and descend vertically - 5 metres. From there, we will see the only way out of the pond, where the light comes of the open sea. By directing to the exit we have to pass through a narrow tunnel of about 1 meter in height and several feet wide. Once arrived on open sea follow the wall on the rights, direction S. The ground abounding dotted with rocks, clear sand and patches of sea grass.
After a course of 10 minutes, the wall goes deep into the mountain, direction O, and we will find a thermocline, a result of the union of fresh and salt water. If we ascend, we will notice that we are in a beautiful, large cave, in the interior of the mountain, where the light enters by holes of the ceiling. Here is an entrance to another cave in which you should not enter since it leads to a large underground river of great difficulty which should only be visited by experienced divers with special knowledge of the course.
During the dive you might find morays, octopus, shoals of bream and other fish in sea bed thick with bright sea grass meadows.
Riu Blanc or Riu del Moraig is one of the deepest underwater freshwater systems of Europe with a unique hydro-geological phenomenon in the world, next to the one discovered on the Greek island of Kephalina. Until now, groups of cavers have moved up to a linear distance of 1,500 m.
The ways through which circulates the marine water are not known but the observations lead us to consider that the water enters the sump of the Cova dels Coloms, on the Morro de Toix (located between Altea and Calpe), passes through the aquifer system of Benissa depression through approximately 20 km of karstic conduits and resurface by the underwater upwelling of the Moraig (in El Poble Nou de Benitatxell).
Currently, the so-called Moraig exploration group has ventured recently got the information of the Grotto. This professional group is aware of the danger of their investigations, which previously already earned life to cavers as Bernhard Pack, José Palmero and Vicente Alegre.