The ruins of Greifenstein Castle are enthroned on a rugged rock above the first helical tunnel of the Rhaetian Railway above Filisur. The castle can be reached on foot from Filisur in around 30 minutes.
The Fortress of Bellinzona is the largest and the only example of a defensive structure still visible in Europe consisting of several castles and a large defensive wall. Originally built by the Dukes of Milan as a defense against Confederate invasion, it blocked the entire Ticino Valley northwards.
Marco Walli, a carver and wood sculptor, acquired Strahlegg Castle near Fideris, which dates back to the 13th century (first mentioned in a document in 1403 as the property of the Streiff), exactly 50 years ago.