Dropping southwest of Davos towards Tiefencastel, you enter the wilderness of Switzerland’s biggest nature park, Parc Ela, which opened in 2006 to protect the region’s biotope and boost its weak economy. Spanning 600 sq km and encompassing 21 communities in the Albula–Bergün and Savognin–Bivio areas, the park is three and a half times the size of the Swiss National Park.