Italy
Guldholm Abbey (German: Güldenholm) was a short-lived Cistercian monastery on the Langsee near Böklund, formerly in Denmark, now in Schleswig-Holstein in Germany. It was founded in 1191 and abandoned after less than twenty years; some of the community went on to establish Ryd Abbey.
Listen to the audio guide for Guldholm Abbey Free on WIP — starts by itself when you arrive, even with the screen off