The château includes approximately 50 rooms that are partly equipped with marble floors, carpets and objets d'art from the old country house.

The public access to the château is restricted, but the spacious park and the tower-like Gugger dwelling house on the peninsula's southern slope are popular points of interest.

In 1650 the lands were given by the city of Zürich to Hans Rudolf Werdmüller who built a villa in the Venetian style where he cultivated horticulture, agriculture, fisheries, and even a blacksmiths workshop.

Among the famous residents was the author Mentona Moser (1874–1971) who was raised on the Au peninsula: "Ich habe gelebt" (I've lived, among others with Au-related descriptions) in one of her published books.

Her mother, Fanny Moser was considered one of the richest women in Europe in the 19th century; in her residence "Belle au bois dormant" she met poets, philosophers, scientists and people perverted from trade and industry.