Uster, CH
Uster Castle (Swiss German: Schloss Uster also referred to Burg Uster) is a hill castle which was built probably around 1200 AD by the House of Rapperswil in the Swiss municipality of Uster in the Canton of Zürich. Since 1995 it houses a boarding school.
Listen to the audio guide for Schloss Uster Free on WIP — starts by itself when you arrive, even with the screen off