The Top 20 Castles around Au (SG)
A visit to a castle — whether you stumble over one during a hike outdoors or walk your way around the grounds with a guide — is always something special, and you’ve got 20
beautiful castles to choose from around Au (SG). Just browse our list to find your top castle , and add some history to your next adventure!
beautiful castles to choose from around Au (SG). Just browse our list to find your top castle , and add some history to your next adventure!
Last updated: November 26, 2025
Alt-Ems Castle Ruins
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It is the longest medieval castle in Austria and is a true highlight at 740m above sea level. The view over the Rhine Valley and the remains of the castle are a true reward for the ascent.
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Gebhardsberg Castle Ruins
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A few looped castle walls have defied the time and from some sides you can still get an approximate impression of the complex. Today it is more of a gastronomic spot on the Känzele hike.
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Wartensee Castle
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Wartensee Castle is located on a hill in Rorschacherberg above Lake Constance. It is surrounded by a large park and was once the country estate of a wealthy family. The …
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Grimmenstein Castle Ruins
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After a pleasant, cool climb through the forest you reach the Burghalde with the Grimmenstein castle ruins. A wonderful view opens up of Lake Constance and the three neighboring states.
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Weinstein Castle
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A small fairytale castle that now houses a romantic restaurant.
More information can be found at schloss-weinstein.ch.
More information can be found at schloss-weinstein.ch.
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