The Servas Bridge, over the Conho River, is one example amongst the numerous bridges built by local communities and other entities, to facilitate the crossing of the rivers and streams that abound here in the Gerês mountains. In fact, without these structures accessibility and mobility within the mountain range would be quite different, especially in winter when the watercourses are in full flow. These bridges have allowed, over the centuries, the creation of a true network of access routes into the mountains for men and animals, allowing them to conquer ravines, watercourses and other obstacles that topography and weather conditions impose on us.

The Conho River rises in the Gerês mountain range, about 1,000 meters above sea level, flowing for about five thousand meters before joining the Fafião River next to the Pigarreira bridge, at an altitude of 400 meters. Throughout its course it forms the typical ‘V’ profile of a young river valley, relatively incised and with hardly any margins. The natural lagoons ("swimming pools") that form in the deepest areas of the riverbed are typical. At the end of summer the water level is very low, and the river may even dry up except for where water is retained in pools. In winter, the river carries a lot of water and the numerous waterfalls come to life. As a result of these characteristics the Conho River is a favorite place for canyoning enthusiasts.