Best natural monuments around Tengen are found within the Hegau region, a distinctive extinct volcanic landscape in Germany. Tengen itself features the Mühlbachschlucht, a picturesque gorge with waterfalls and historical mill remnants. The broader area is characterized by conical hills, remnants of ancient volcanoes, many topped with castle ruins. This geological setting provides a diverse environment for outdoor exploration.
Last updated: October 13, 2026
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A natural phenomenon here in the Danube Valley. A dry riverbed because the ground is karst and the riverbed has virtually no gradient.
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The present ruins of the summit castle are located on the summit of the 644 m high Hohenkrähen ("Krayen"), a mountain of volcanic origin north of Singen in the Hegau, between the villages of Duchtlingen, Schlatt unter Krähen and Mühlhausen in the Duchtlingen district.
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Steep but well-secured stone path to the castle ruins.
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Beautiful viewpoint from the hiking trail around the crater lake of the deep blue lake and the volcanic caldera.
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You have to have been there
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And gone it is, the Danube!
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On the rock trip No. 1 Yellow Line you can experience the Rhine Falls from a unique perspective. The ship takes you to the heart of the Rhine Falls, the mighty central rock. During a 20-minute stop there you have the opportunity to climb the more than 100 steps to the 30-meter-high viewing platform. The climb is worth it, once you reach the top you are rewarded with a unique 360-degree view of the Rhine Falls. On the return trip to the harbor there is another incomparable photo backdrop! Source: https://rhyfall-maendli.ch/linienfahrten-erlebnisse/felsenfahrt/
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It is impressive how much water is constantly coming down there. A great natural spectacle.
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Tengen is home to the picturesque Mühlbachschlucht (Mühlbach Gorge). This gorge features cascading waterfalls, including one with a 13-meter drop, and a well-developed circular hiking trail with bridges and footbridges. You can also discover the ruins of an old mill and remnants of historical millstone mining along the path.
Yes, the Hegau region, where Tengen is located, is an extinct volcanic landscape. A notable geological site is the Höwenegg Crater Lake, also known as the 'Blue Eye' of the Hegau. This lake formed in a former mining area within a volcanic crater, showcasing the region's volcanic past. The entire Hegau is characterized by conical hills, which are remnants of ancient volcanoes.
The Mühlbachschlucht in Tengen features remnants of historical millstone mining and an old mill. In the broader Hegau region, many volcanic cones are topped with medieval castle ruins. For example, Hohenhewen Castle and Hohenkrähen Castle Ruins are situated on volcanic hills, offering a blend of natural landscapes and historical architecture. Further afield, Laufen Castle at the Rhine Falls is a 1200-year-old historical site directly adjacent to the impressive waterfall.
For breathtaking panoramic views, consider visiting Hohenhewen Castle. From its viewing platform, you can see the Hegau mountains, Lake Constance, and the Swabian Alb, and even the Alps on clear days. Similarly, the Hohenkrähen Castle Ruins, perched on a volcanic cone, offers a fantastic view of the fortress Hohentwiel, Mägdeberg Castle, and the western Lake Constance area.
The Mühlbachschlucht in Tengen is an accessible and easy hiking experience suitable for families, offering a blend of natural beauty and historical elements. The Rhine Falls and Laufen Castle at the Rhine Falls are also considered family-friendly, with facilities and viewing platforms designed for visitors of all ages.
The Mühlbachschlucht is particularly impressive after heavy rainfall or during strong frost, when the waterfalls are at their most dramatic. However, its serene atmosphere and lush greenery make it a pleasant visit throughout the warmer months as well.
The region around Tengen offers diverse outdoor activities. You can find numerous routes for cycling, gravel biking, and running. For instance, there are cycling routes like the 'View of the Hegau Volcanoes – View of the Hegau loop' and running trails such as the 'Mühlbach Gorge – View of the Alps over Tengen loop'. You can explore more options in the Cycling around Tengen, Gravel biking around Tengen, and Running Trails around Tengen guides.
Yes, the Mühlbachschlucht in Tengen features a well-developed circular hiking trail. For more extensive hiking, the Hegau volcanic landscape offers trails leading to sites like Hohenhewen Castle and Hohenkrähen Castle Ruins, often with intermediate to challenging difficulty. You can find various running and hiking routes in the Running Trails around Tengen guide.
The Rhine Falls is an impressive natural spectacle, being the largest waterfall in Europe. It is 150 meters wide and 23 meters high, with up to 600,000 liters of water per second cascading down, especially dramatic after snowmelt. Its estimated age is approximately 15,000 years, making it a truly ancient and powerful natural landmark.
Yes, the Mühlbachschlucht in Tengen features a designated barbecue area with seating, inviting visitors to linger and enjoy the natural surroundings. This makes it an ideal spot for a picnic or a relaxing break during your exploration.
While specific wildlife sightings are not guaranteed, the diverse ecosystems of the Hegau volcanic landscape and the lush environment of the Mühlbachschlucht provide habitats for various local flora and fauna. Keep an eye out for birds, small mammals, and diverse plant life typical of central European forests and river gorges.


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