Natural monuments around Rielasingen-Worblingen are situated in the Hegau region, an area defined by its unique volcanic landscapes and river valleys near Lake Constance. This diverse geography offers a blend of geological formations and natural waterways. The region provides opportunities to explore ancient volcanic cones, historic castle ruins, and scenic river environments. These natural features contribute to the area's appeal for outdoor activities and offer insights into its geological history.
Last updated: June 25, 2026
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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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It is worth a visit, entrance costs 5 euros
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A very nice cycle path
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With an average flow rate of ten cubic meters per second, the Radolfzeller Ach is the fourth largest inflow into Lake Constance.
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Big, wild ruin with several paths, passages and some brickwork!
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The Lake Constance area is very nice here
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Great photo opportunities at every corner and a super nice view
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The region is characterized by its unique volcanic landscapes, remnants of ancient volcanic activity. You'll find impressive volcanic cones like Hohenstoffeln Summit, which dramatically shapes the Hegau landscape, and the volcanic cone on which Hohenkrähen Castle Ruins sits. River valleys and the path along the Rhine also contribute to the diverse natural environment.
Yes, many natural monuments are intertwined with historical sites. For instance, Hohenkrähen Castle Ruins and Mägdeberg Castle Ruins are both located on prominent natural elevations, offering strategic views. Hohenstoffeln Summit also features remnants of three castle ruins and traces of past basalt mining, adding a historical layer to its natural beauty.
Absolutely. The Mouth of the Radolfzeller Aach, where the river flows into Lake Constance, is considered family-friendly and offers a pleasant bike path through the reed landscape. The Rosenegg Nature Trail, while not explicitly listed as a highlight, is a circular route offering educational insights into local flora and fauna, suitable for families.
The natural monuments often provide spectacular panoramic views. From Hohenkrähen Castle Ruins, you can see the fortress Hohentwiel, Mägdeberg Castle, and the western Lake Constance area. The Rosenegg Nature Trail also offers magnificent panoramic views of Lake Constance and the Hegau's volcanic cones.
The region offers a variety of outdoor activities. You can explore numerous hiking trails, including easy routes like the 'Ruins of Rosenegg Castle – Rosenegg Viewpoint loop'. Mountain biking is also popular, with trails such as the 'Solar Tower Moos – Small beach at Lake Constance loop'. For more options, check out the easy hikes, MTB trails, and running trails guides for Rielasingen-Worblingen.
Yes, many natural monuments are integrated into hiking routes. For example, the ascent to Hohenkrähen Castle Ruins is a crisp and demanding hike. The Mägdeberg Castle Ruins is also a popular destination on hiking trails. The Rosenegg Nature Trail is a dedicated circular route around a volcanically shaped mountain.
The natural monuments around Rielasingen-Worblingen can be enjoyed throughout the year, but spring and autumn offer particularly pleasant temperatures for hiking and exploring. During snowmelt or heavy rain, the Bohlinger Schlucht becomes especially dramatic, showcasing powerful erosive forces. The vineyards and orchards also add to the picturesque scenery in warmer months.
While specific leash requirements vary, many natural areas and trails around Rielasingen-Worblingen are generally dog-friendly. It's always advisable to keep dogs on a leash, especially in nature conservation areas or near wildlife, and to respect local signage. Always carry waste bags and ensure your dog is well-behaved around other visitors and animals.
Beyond the prominent volcanic cones and castle ruins, the region offers the captivating Hohentwiel Fortress Ruins, which is a massive fortress on a volcanic mountain. You can also explore the Bohlinger Schlucht (Bohlingen Gorge), a deep cut into the mountain that becomes a powerful traveling stream during wet periods, offering a display of natural erosive forces.
Parking is generally available near popular natural monuments and trailheads. For instance, there is a hiking car park approximately 300 meters from Mägdeberg Castle Ruins. It's recommended to check specific locations for parking availability before your visit, especially for less frequented spots.
Visitors frequently praise the fantastic views and the exciting historical aspects of the castle ruins. The challenging ascents, such as to Hohenkrähen Castle Ruins, are often highlighted as rewarding experiences. The unique volcanic landscape and the opportunity to explore both nature and history are also highly appreciated.
For easier access, the path along the Rhine offers an idyllic river landscape perfect for leisurely exploration. The Mouth of the Radolfzeller Aach is also easily accessible, with a pleasant bike path through the reed landscape. These locations are generally less strenuous than the volcanic summit ascents.


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