The Rätikon is a range of the Central Eastern Alps located at the border between Vorarlberg, Liechtenstein and Graubünden. It is the geological border between the Eastern and Western Alps and stretches from the Montafon as far as the Rhine. In the south, the Prätigau is its limit, in the north the Walgau. In the east, it borders the Silvretta groups. The most general definition of mountain range is a group of mountains bordered by lowlands. ... The Central Eastern Alps are the core ranges of the Eastern Alps with the highest peaks, located between the Northern Limestone Alps and the Southern Limestone Alps, from which they differ in geological composition. ... Vorarlberg is the westernmost federal state of Austria. ... Graubünden or Grisons (German: Graubünden; Italian: Grigioni; Romansh: Grischun; French: Grisons), is the largest and easternmost Swiss canton. ... Montafon is the valley in Austria extending from Bludenz to the Silvretta. ... The Rhine canyon (Ruinaulta) in Graubünden in Switzerland Length 1,320 km Elevation of the source Vorderrhein: approx. ... Silvretta - 360° panoramic view (Photo: Mg-k) The Silvretta is a mountain range of the Central Eastern Alps shared by Tirol, Vorarlberg (both in Austria and Graubünden (Switzerland). ...