Best castles around Alt St Johann und Unterwasser are found in the scenic Toggenburg region of Switzerland, known for its picturesque natural landscapes and outdoor activities. While Alt St. Johann itself is more recognized for recreation, the surrounding area features historical sites with significant pasts. These locations offer insights into medieval history and provide panoramic views over the valleys. The region combines natural beauty with historical exploration, making it a destination for those interested in both.
Last updated: July 9, 2026
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An above-averagely large and well-preserved/maintained castle ruin with beautiful views. Very worthwhile.
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Werdenberg is definitely worth a visit
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A wonderful, picturesque little town. Definitely worth a visit.
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Werdenberg, always worth a visit.
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superb ruin with beautiful barbecue area
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In front of the ruins there is a small but nice barbecue area.
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Werdenberg is the oldest wooden settlement in Switzerland Werdenberg is the oldest wooden settlement in Switzerland and is best known for the castle of the same name, which stands on the hill above the town. The small Werdenberg Lake gives the town additional charm. Werdenberg at a glance Werdenberg Castle can be seen from afar. It stands on the castle hill 45 metres above the valley floor in front of the panorama of the Alpstein and the Alvier group and offers a magnificent view over the Rhine valley to the Alps. Today owned by the canton and of considerable size, it was originally just a single tower. The spacious staircase, the surrounding walls and the castle courtyard with the cistern were added later. In the Middle Ages, the castle was the seat of power of the Counts of Montfort and Werdenberg and from the 16th century it was the seat of the Glarus bailiwick. In addition to being used as a military hospital by French troops during the Napoleonic Wars, it also survived the notorious foehn storms of the Rhine Valley, which often caused fires. At the foot of the castle hill lies the small medieval town of Werdenberg, which has a picturesque market square with arbors. Remains of the archway still indicate the former main entrance. A staircase leads up to the castle through the vineyards. On the valley side, Werdenberg nestles against the small Werdenberg Lake. The defensive city wall once formed the lake front. Today, the remains of the wall serve as an impressive base on which the pretty wooden houses dating from the 15th to 17th centuries were built. A particularly valuable example in architectural terms is the Snake House with its baroque painting. Text / Source: Switzerland Tourism https://www.myswitzerland.com/de-ch/reiseziele/werdenberg/
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Gräpplang Castle, also called Castrum Flumius, is the ruin of a spur castle near Flums in the canton of St. Gallen in southeastern Switzerland. The name Groppa lunga means long rock. The Romansh origin of the word suggests that this language was widespread in this area. Source: Wikipedia
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The region offers a mix of well-preserved medieval towns, castle ruins, and ancient watchtowers. For example, you can visit the Historic Old Town of Werdenberg, which is recognized as the smallest town in Switzerland with an 800-year history, or the Gräpplang Castle Ruins, situated on a rock spur above the Seez valley.
Yes, several sites are suitable for families. The Historic Old Town of Werdenberg and Werdenberg — Old Town, Castle and Lake are both listed as family-friendly, offering museums and historical exploration. The Stralegg Castle Ruins (Roman Watchtower) is also noted as family-friendly.
Many castle sites offer stunning natural views. For instance, Gräpplang Castle Ruins provides wonderful views of the Churfirsten mountains and Walensee. Werdenberg — Old Town, Castle and Lake features a picturesque lake and panoramic views over the Rhine valley to the Alps.
Yes, the Toggenburg region is excellent for hiking. You can find various routes, such as the 'View of Säntis – Gräppelensee loop' or 'View of the Alpstein – View of the Churfirsten loop', which can be combined with visits to nearby historical sites. For more hiking options, explore the hiking guide for Alt St. Johann and Unterwasser.
The region's castles and ruins are generally best visited during the warmer months, from spring to autumn, when hiking trails are clear and the weather is pleasant for outdoor exploration. Winter visits are possible, but some paths might be snowy, and the focus shifts more towards winter sports in Alt St. Johann itself.
Historically, Alt St. Johann was home to Starkenstein Castle, built around 1200. However, current information indicates that Starkenstein Castle does not remain as a visible structure or a visitable ruin with preserved features. The village is now known more for its scenic beauty and outdoor recreation.
Absolutely. The Gräpplang Castle Ruins offer wonderful views of the Churfirsten and Walensee. Similarly, the Wildenburg Castle Ruins provide a great vantage point over the surrounding landscape. The castle at Werdenberg — Old Town, Castle and Lake also stands 45 meters above the valley floor, offering magnificent views over the Rhine valley.
Visitors appreciate the well-preserved medieval architecture, the rich history, and the panoramic views offered by many of the sites. The combination of historical exploration with the stunning natural landscapes of the Toggenburg region is a major draw, as evidenced by over 315 upvotes and 250 photos shared by the komoot community.
Yes, the region offers gravel biking opportunities. While not always directly passing castles, routes like the 'Gräppelensee – Gamplüt Mountain Inn loop' can be found in the vicinity of some historical sites. You can find more options in the gravel biking guide for Alt St. Johann and Unterwasser.
For a site like the Historic Old Town of Werdenberg, with its museum and charming streets, you might want to allocate a few hours. For castle ruins such as Gräpplang or Wildenburg, the visit duration depends on whether you combine it with a hike, but the ruins themselves can be explored in an hour or two.
While the main highlights are well-regarded, the Stralegg Castle Ruins (Roman Watchtower), though not extensively preserved, offers a unique historical perspective as a former Roman watchtower later rebuilt in the Middle Ages. Its location above Lake Walen provides a scenic, less-traveled experience.
The castles and ruins in the area, such as those in Werdenberg and the Wildenburg, reflect centuries of regional history, including periods under the Counts of Werdenberg, Montfort, and later various cantonal administrations. They served as seats of power, defensive structures, and administrative centers, offering insights into medieval life and conflicts in eastern Switzerland.


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