Corzán River Nature · Negreira, Barcala, A Coruña Image of Negreira, not of the place itself. Deeply cut tributary that comes down from the hill of the same name and is fitted out for canyoning, one of the outdoor activities the concello has developed in recent years. Photo: Iago Casabiell González (CC BY-SA 4.0) What to see and do in Negreira