At 10 Km. from Ribadeo, Galicia, at low tide you can access the Beach of the Holy Waters (Praia de Augas Santas) better known as "As Catedrais beach" (Praia das Catedrais) or Playa de Las Catedrales (in Castilian). From the beach, washed by the Cantabrian Sea, you can see some real natural monuments, by erosion, which rise above 30 meters and remind imposing structures such as cathedrals, in fact.