Barcala River walk Activity · Negreira, Barcala, A Coruña Image of Negreira, not of the place itself. A made-up trail of almost six kilometres that sets out beside the Church of San Xulián de Negreira and follows the River Barcala, linking the town centre with the Cobas recreation area. Photo: Iago Casabiell González (CC BY-SA 4.0) What to see and do in Negreira