Landforms of the Grisons

thumb|right|Pothole thumb|right|Viamala in a drawing by J. W. Goethe; 1 June 1788 thumb|300px|Tourist access at the gorge

250px|thumb|right|Ruinaulta from the Il Spir viewpoint

chine

largest landslide in the Alps

Chaviolas is an island in Lake Sils, located in the canton of Graubünden. It is the largest island in Lake Sils, the second largest being located west. The island has a maximum length of and a maximum width of and includes a triangular bay on its northern side. Its highest point is above sea level or above lake level (), making it among the highest islands in Switzerland and in the Alps. Its surface is entirely wooded. The island lies in the bay south of the peninsula of Chastè, about from the shore.