The wolf trap just outside Lubián is a remarkable piece of popular architecture designed to capture wolves. It was in operation until the mid-1960s. It is doubtful whether it was ever an efficient way of capturing them, and it must have involved a huge effort on the part of the local population to build and maintain it. Whataver the case, whenever a wolf was found to be killing local sheep, a goat or sheep would be tethered inside the trap. When, an unfortunate wolf jumped in. the high walls prevented it from jumping out and it would be trapped. The church bells in Lubián would rang. The animal would be caught, caged and paraded around the local villages, who would give presents to the Lubians in thanks, as they tormented the condemned animal.
The Arribes del Duero is a stunning gorge separating Spain and Portugal. The gorge cuts through granite rock and runs some eighty kilometres, of which fifty run alongside the Portuguese border, with cliffs rising to more than 200 metres in places. The cliffs support superb birdlife including griffon vultures, golden eagles and black storks are overs. Boat trips starting at Fronteira de Zamora can be arranged. There are also several hydroelectricity dams along the river. Spanish philosopher Miguel de Unamuno described Arribes del Duero as “One of the most beautiful and impressive landscapes in Spain.”
Arribes del Duero is also a natural park, covering 106.105 ha. Portuguese natural park lies alongside Arribes del Duero. Taking the two parks together, Douro Internacional covers 191.255 ha making it one of the largest protected areas in Europe.