Northern slope of the Pyrenees in Bausen Nature · Bausen, Val d'Aran, Lleida Image of Bausen, not of the place itself. The landscape of the municipality of Bausen, in the Val d'Aran, belongs to the Atlantic slope of the Pyrenees, at its western end. It is a very mountainous area, watered by the Bausen river, with abundant granite rock and Silurian outcrops; in the higher parts there are small estanys, and the fir and beech forests stand out. Photo: Pere López Brosa (CC BY-SA 4.0) What to see and do in Bausen