Kreuzlingen, CH
Seeburg Castle is a castle in the municipality of Kreuzlingen of the Canton of Thurgau in Switzerland. It is a Swiss heritage site of national significance. There is more information about it at a site (implausibly entitled) Ancient History Sites. The Schloss is currently used as a meeting space and
restaurant according to its website.
Listen to the audio guide for Schloss Seeburg Free on WIP — starts by itself when you arrive, even with the screen off