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Switzerland
Eastern Switzerland
Thurgau
Bischofszell

Hohentannen

Top 20 Natural Monuments around Hohentannen

Natural monuments around Hohentannen, a municipality in the canton of Thurgau, Switzerland, are characterized by diverse natural features. The region's landscape was shaped by glacial activity, leading to unique formations such as raised bogs and hills offering panoramic views. These natural landmarks provide opportunities for exploration and appreciation of local ecology and geology. Hohentannen serves as a starting point for discovering these natural attractions.

Best natural monuments around Hohentannen

  • The most popular natural monuments is Last Ruin, a castle that features an old ruined tower of a hilltop castle, dating back to the 12th century. This relatively well-preserved tower ruin is located along the Schönenberger Ruinenweg.
  • Another must-see spot is Nollen, a viewpoint and summit. This 735-meter high hill offers panoramic views of Lake Constance, the Thur Valley, the Hegau, the Säntis, and the Churfirsten.
  • Visitors also love Hudelmoos Nature Reserve, a natural monument with moors, moor birch forests, and ponds. This nature reserve is criss-crossed with paths and offers insights into the formation and use of moors.
  • Hohentannen is known for viewpoints, nature reserves, and historical ruins. The area offers a variety of natural monuments to see and explore, from glacial landscapes to protected wetlands.
  • The natural monuments around Hohentannen are appreciated by the komoot community, with more than 100 upvotes and over 50 photos shared by visitors.

Last updated: June 26, 2026

Nollen

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The Nollen is 735 meters high and offers a magnificent panoramic view of Lake Constance, the Thur Valley, the Hegau, the Säntis and the Churfirsten.

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Hudelmoos nature reserve
Luminous birch trunks in front of dense reed belts, glittering streams between ponds, radiant swamp marigolds - thanks to individual paths that lead into the area, you can experience the Hudelmoos high moor with its springy ground under your feet.
The moraine landscape in this area was formed by the glaciers of the last Ice Age. After the ice masses retreated, small lakes formed in deeper, dense areas, from which bogs such as the Hudelmoos developed over the course of thousands of years.


History of the Hudelmoss
The increasing hunger for energy due to the growing population and industrialization in the 18th century led to peat extraction in many places. So peat was cut in the Hudelmoos from around 1750 until the middle of the 20th century. As a result of this degradation, only remnants of the original moor are left today.


Since this area was placed under cantonal protection in 1977, the largely dismantled raised bog has been regenerating. Ried meadows (small sedge and pipe grass meadows) have formed on the less humid areas. In 1990 the Hudelmoos was included in the "Federal inventory of raised and transitional moors of national importance". The aim of the current maintenance measures is to preserve the species-rich reed meadows and the generally large biodiversity and to enable further regeneration of the raised bog.

Biodiversity hotspot
The Hudelmoos is now considered a biodiversity hotspot. A monograph published in 1992 lists the following species numbers, among others:
• 40 birds
• 210 butterflies (including moths)
• 29 dragonflies
• 348 vascular plants
• 98 mosses (including 15 peat mosses)
• 298 mushrooms
Text: pro natura
pronatura-tg.ch/de/naturschutzgebiet-hudelmoos

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Hudelmoos Nature Reserve

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A moor is being repaired "Info Center"

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Last Ruin

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The Ruine Trail is located at the Last ruins, is approx. S2

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Bruderloch Cave

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Impressive caves (artificially created) and a very cool way to get there!

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Tips from the Community

Thomas
April 7, 2026, Ruine Last

Is actually only worth it if you are there anyway. The best thing is the view from the opposite slope.

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Carlo Schudel
October 12, 2024, Ruine Last

A very varied and interesting hike with good signage and paths

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Waldleben
July 13, 2024, Nollen

Because the view can be beautiful in good weather, and people like to come up here.

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🅰️strid
September 18, 2022, Ruine Last

http://www.ruinelast.ch/mobile/

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sunnysisland
July 16, 2022, Ruine Last

Great tour, good basic construction and surefootedness required, some sections of the route are more difficult to walk on

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Driving is prohibited in Hudelmoos. So park your bike and set off on foot!

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You can leave your bike here (if necessary even chain it to the no-biking sign) and then explore the Hudelmoos on foot. You should plan an hour for this.

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Very beautiful moor, accessible via a well-maintained network of paths. Various information boards provide information on all sorts of topics (history, natural history, etc.).

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Frequently Asked Questions

What kind of natural features can I expect to see around Hohentannen?

The natural monuments around Hohentannen showcase a diverse landscape shaped by glacial activity. You can explore unique formations such as the raised bog at Hudelmoos Nature Reserve, hills offering panoramic views like Nollen, and even geological phenomena such as the Landslide Road. The region features forests, wetlands, and river valleys.

Are there any historical natural monuments in the Hohentannen area?

Yes, the Last Ruin is a notable historical natural monument. It features an old ruined tower of a hilltop castle dating back to the 12th century, located along the Schönenberger Ruinenweg. While primarily a historical site, its integration into the natural landscape makes it a unique monument.

What is the Hudelmoos Nature Reserve and what makes it special?

The Hudelmoos Nature Reserve is a significant raised bog and nature reserve near Hohentannen. It's special because it's a unique landscape formed by the Rhine Glacier, featuring moor birch forests, small streams, and ponds. It's recognized for its remarkable biodiversity, including rare plants like bog cranberries and sundew, and serves as a crucial habitat for amphibians. Visitors can walk on designated paths to experience the springy bog floor.

Are there family-friendly natural monuments or activities around Hohentannen?

Yes, several natural monuments are suitable for families. The Hudelmoos Nature Reserve offers accessible paths through the moor, making it great for walks with children. The Nollen viewpoint is also considered family-friendly, providing impressive panoramic views that can be enjoyed by all ages.

What are the best viewpoints to visit for scenic panoramas?

For breathtaking panoramic views, the Nollen is highly recommended. This 735-meter high hill offers magnificent vistas of Lake Constance, the Thur Valley, the Hegau, the Säntis, and the Churfirsten. It's often referred to as 'the Rigi of Thurgau' due to its expansive outlook.

What outdoor activities can I do near these natural monuments?

The area around Hohentannen offers a variety of outdoor activities. You can find numerous routes for gravel biking, mountain biking, and running. For example, there are many gravel biking routes, MTB trails, and running trails that allow you to explore the natural beauty of the region, often passing by these monuments or offering views of them.

Where can I park when visiting the Hudelmoos Nature Reserve?

There is a suitable and larger car park available at the Hudelmoos Nature Reserve Parking Area. This parking is free and conveniently located for accessing the reserve's paths and exploring the high moor.

What is the best time to visit the natural monuments around Hohentannen?

The natural monuments around Hohentannen can be enjoyed throughout the year, but the best time often depends on your preferred activity. Spring and autumn offer pleasant temperatures for hiking and cycling, with vibrant flora in spring and colorful foliage in autumn. Summer is ideal for longer days and exploring, while winter can offer unique snowy landscapes, especially at viewpoints like Nollen.

Are there any challenging trails or natural monuments for experienced adventurers?

Yes, for those seeking a more challenging experience, the Landslide Road is noted as a challenging natural monument. This path has been affected by natural geological movements, making it an interesting, albeit sometimes difficult, route for pedestrians and cyclists. Always check local conditions before attempting challenging trails.

What do visitors enjoy most about the natural monuments in this region?

Visitors frequently appreciate the diverse natural beauty and the opportunities for outdoor recreation. The panoramic views from Nollen are a highlight, as is the unique experience of walking through the Hudelmoos Nature Reserve with its springy bog floor and rich biodiversity. The historical context of sites like the Last Ruin also adds to the appeal.

Can I find information about the formation and history of the moors in the Hudelmoos Nature Reserve?

Yes, the Hudelmoos Nature Reserve provides insights into the formation and use of moors. The landscape was shaped by glaciers, leading to the development of bogs over thousands of years. There are paths and information points within the reserve that explain its history, including past peat extraction and ongoing regeneration efforts, highlighting its ecological importance.

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Extend your search for the best caves by checking out these guides of the top ones around Hohentannen:

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