Buelna beach and karst limestone El Picon rock pillar at high tide on a windy day, near Llanes, Asturias, Spain, Europe

Natural rock archway carved by the sea through limestone rock at Cuevas del Mar (sea caves) beach, near Llanes, Asturias, Spain, Europe

Playa de Poo, near Llanes, Costa Verde (Green Spain), Asturias, Spain, Europe

Castro de Gaviotas (Gull's fort) karst limestone rock archway, and La Canalina bay, near Llanes, Asturias, Spain, Europe

Karst limestone sea cliffs at Pria, with Picos de Europa mountains in the background, near Llanes, Asturias, Spain, Europe

Niembro Bay with church and cemetery of Los Dolores at low tide, near Llanes, Asturias, Spain, Europe

Natural rock archway carved by the sea through karst limestone rock at Cuevas del mar (sea caves) beach, near Llanes, Asturias, Spain.

Bufones de las Arenillas, Geyser by breaker, karst, tides, sea, Atlantic ocean, near Llanes, Camino de la Costa, Coastal route, Camino del Norte, Way of Saint James, Camino de Santiago, pilgrims way, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe