Rhäzüns Castle (Romansh Chastè da Razén) is located in the east of the municipality of Rhäzüns in the canton of Graubünden. The castle is located on the lower reaches of the Hinterrhein before its confluence with the Vorderrhein on a striking plateau of the Bonaduz Formation (gravel, etc.) and a core of transported limestone rubble from the Tamins landslide, 65 m long and 25 m wide. To the east the terrain slopes steeply towards the Rhine. Access to the artificially expanded ditch is from the southwest via a dam built around 1700. Original access was either via a bridge or a steep ramp. The main buildings are leaning on the inside of a circular wall that runs from north to south. The wall runs into nothing at its ends and once comprised a larger complex. The east side is protected by a we