The chain of the ría Curiosity · Corcubión, Fisterra, A Coruña Image of Corcubión, not of the place itself. Oral tradition tells that a chain joined the castle of El Cardenal with that of El Príncipe, on the Cee shore, and that when drawn tight it prevented enemy ships from passing towards the head of the estuary. Photo: Lansbricae from Santiago de Compostela, España (CC BY-SA 2.0) What to see and do in Corcubión