Located to the east of the province of Ourense, the mountains of Pena Trevinca are a protected nature reserve that covers almost 25,000 hectares. Its summits – more than 2,000 metres high and covered by snow in the winter – are crowned by glacial lakes such as O Celo or the Lagoa da Serpe, with the purest and most crystalline of water. These are mountains that barely show the imprint of man.
In the town of Carballeda de Valdeorras, by the River San Xil, is the Teixadal de Casaio. A fabulous yew forest – the largest in Europe – with more than 300 yew stretching out their centuries- (perhaps millenia-) old branches and roots extending, between young holly, ash and hazelnut trees.