Castle of a Concepción Monument · Cedeira, Ferrol, A Coruña An 18th-century hexagonal fort raised on a headland at the entrance to the ría, once armed with thirty cannon; today it works as a museum and as a viewpoint over the town, the beach and the open sea. Photo: Mussklprozz (CC BY-SA 4.0) What to see and do in Cedeira