Hünegg Castle stands on the south shore of Lake Thun at Hilterfingen, about four kilometres east of Thun town. It is a neo-Renaissance pile from the 1860s, and its extraordinary quality is that everything inside — furniture, wallpapers, curtains, crockery — is original. The castle passed from one wealthy owner to another through the late 19th and early 20th centuries, each leaving their mark in successive layers of decoration, and then simply closed up in 1944.
The result is an unspoiled interior spanning Second Empire, Historicism, and Art Nouveau periods all coexisting in the same rooms. It feels genuinely inhabited rather than museum-arranged. The grounds run down to the lake and are beautiful in summer. Hünegg is reached by boat from Thun (the paddle steamer calls at the nearby landing stage), or by bus.