Haldenstein Castle is a castle in the former municipality of Haldenstein of the Canton of Graubünden in Switzerland. It is a Swiss heritage site of national significance.
Wikipedia https://en.wikipedia.org/wiki/Haldenstein_Castle
Official Website https://schlossgarten.ch/
Address 4 Schlossweg, Haldenstein 7023, Switzerland
Coordinates 46°52'42.263" N 9°31'37.259" E