Best natural monuments around Altthann are situated in the Haut-Rhin department of France, within the Vosges Mountains. This region features a landscape characterized by natural grandeur and unique geological formations. Visitors can explore various sites that offer opportunities for outdoor activities. The area's natural monuments often combine scenic beauty with historical significance.
Last updated: July 2, 2026
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Highlight • Viewpoint
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One of the most beautiful climbs in the Vosges and a must to ride once. My favorite side is the one from Moosch or Soultz
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The “Roche Sermet” is a rock formation located on the Hartmannswillerkopf¹ battlefield. It is located at an altitude of approximately **910 meters**². Hartmannswillerkopf, also known as Vieil Armand, is a pyramidal rocky spur in the Vosges massif, overlooking the Alsace plain from its 957 meters¹. During the First World War, it was a strategic summit hotly contested by the French and German armies¹. Today, the Hartmannswillerkopf is a place of memory, bearing witness to the suffering of the soldiers who fought in the name of their country¹. The German remains encountered on the ground, sometimes quite spaced apart from each other, are witnesses to this historical period¹. Source: conversation with Bing, 05/07/2024 (1) HWK: Vestiges of the Past - e-monsite. https://hartmannswillerkopf.e-monsite.com/pages/hwk-vestiges-du-passe.html. (2) Presentation. https://hartmannswillerkopf.e-monsite.com/pages/presentation.html. (3) The Hartmannswillerkopf | Paths of memory. https://www.cheminsdememoire.gouv.fr/en/hartmannswillerkopf. (4) The Hartmannswillerkopf - Official website. https://www.memorial-hwk.eu/.
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There are now quite a few stickers on the sign. Good parking in the immediate vicinity (1km) to the summit.
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Beautiful pass crossing with wonderful views over the Rhine plain to the Black Forest and, if the weather is clear, to the Alps
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Very crowded in parts at the weekend, better come during the week.
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The Col du Grand Ballon from Moosch is 12.6 km long with a total drop of 949 m. The average gradient is 7.6% with maximum gradients of 14.5%. There are stunning panoramic views of the surrounding mountains and valleys. The climb is often included in the Tour de France.
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I came via Gerardmer, COL de Gorge and then up the ridge along the D430 to the Grand Ballon... Mega approach with fantastic views
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Visitors frequently enjoy the historical significance and panoramic views offered by sites like the Hartmannswillerkopf National Monument, which commemorates World War I. Another popular spot is The Witch's Eye (Engelbourg Castle), a 13th-century castle ruin providing magnificent views over Thann. The Viewpoint at the summit of Vieil Armand also offers extensive vistas towards the Grand Ballon and the Black Forest.
Yes, the Hartmannswillerkopf National Monument is considered family-friendly, offering a unique blend of history and natural setting. For a more active family outing, the area around Lac de Kruth-Wildenstein provides a wide range of activities suitable for all ages, including swimming, pedal boating, and easy hiking trails.
The Vosges Mountains offer a diverse range of natural features. You can explore high peaks like the Grand Ballon, which provides panoramic views, and scenic mountain passes such as the Hundsruck Pass. The region is also home to beautiful glacial lakes like Lac du Ballon and Lac des Perches, as well as the larger artificial lakes of Lac de la Lauch and Lac de Kruth-Wildenstein, all set amidst forests and unique geological formations.
Many natural monuments in the region have significant historical ties. The Hartmannswillerkopf National Monument and the Viewpoint at the summit of Vieil Armand are deeply connected to World War I history, featuring trenches, bunkers, and memorials. The Witch's Eye (Engelbourg Castle) is a 13th-century castle ruin that offers historical context alongside stunning views.
The area around Altthann is excellent for various outdoor activities. You can find numerous hiking trails, from easy strolls around lakes to challenging ascents in the mountains. Cycling is also very popular, especially along the scenic Route des Crêtes or around the lakes. For specific routes, you can explore Running Trails around Altthann, MTB Trails around Altthann, and Cycling around Altthann.
Absolutely. The Vosges Mountains offer extensive hiking opportunities. For instance, trails around Lac du Ballon connect to the Grand Ballon, and Lac des Perches is accessible only on foot, offering a tranquil hiking experience. The Route des Crêtes also provides access to numerous trails. You can find detailed routes and their difficulties in the Running Trails around Altthann guide.
The best time to visit largely depends on your preferred activities. Spring and summer (May to September) are ideal for hiking, cycling, and enjoying the alpine flowers, with clear days offering extensive panoramic views. Autumn brings beautiful foliage. Winter offers opportunities for downhill and cross-country skiing, especially around the Grand Ballon and along the Route des Crêtes, though some roads might be affected by snow.
Yes, the diverse ecosystems of the Vosges Mountains support a variety of wildlife. Around the Grand Ballon, you might spot chamois, black grouse, and even golden eagles. The area around Lac de la Lauch is a natural reserve where you can observe various bird species, insects, and beavers. Lac de Kruth-Wildenstein also boasts rich biodiversity, including amphibians and reptiles.
The Route des Crêtes is a prime example, winding along the main ridge of the Southern Vosges and offering continuous spectacular views. This route provides access to key natural sites like the Grand Ballon, Le Hohneck, and various ski resorts. It's a popular destination for motorists and bikers looking to experience the region's natural beauty.
Visitors particularly appreciate the stunning panoramic views from high points like the Grand Ballon and the Viewpoint at the summit of Vieil Armand. The serene beauty of the glacial lakes, the rich historical context of sites like the Hartmannswillerkopf National Monument, and the diverse opportunities for outdoor activities like hiking and cycling are also highly valued by the komoot community.
Many sites offer excellent photographic opportunities. The panoramic views from the Grand Ballon and the Route des Crêtes are breathtaking, especially on clear days. The serene reflections on Lac du Ballon and Lac des Perches provide picturesque scenes. The unique geological formations and historical structures at sites like The Witch's Eye (Engelbourg Castle) also make for compelling subjects.
The Vosges Mountains are characterized by their rounded summits, locally known as 'ballons,' such as the Grand Ballon. The glacial lakes like Lac du Ballon and Lac des Perches are remnants of past glacial activity, nestled in ancient cirques. Lac des Perches, in particular, is known for its origin linked to volcanic phenomena and tectonic dislocation, showcasing the region's dynamic geological history.


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