Watered by the River Segre, La Cerdanya extends from the Andorran massifs to the Sierra del Cadí. From Ribes de Freser to Puigcerdà, the road is cut into the cliff face for almost its entire length up to the Collado de Toses, commanding impressive views of the valley's wooded slopes. The river will take you past countless villages as you explore the region's rich heritage: the bell tower of Puigcerdà, the main square of Bellver de Cerdanya and Santa María Cathedral at Seo de Urgel.