Best natural monuments near Horperath are characterized by the unique volcanic geology of the Vulkaneifel region. This area offers a blend of geological exploration and scenic beauty, shaped by its volcanic past. The landscape features distinct formations such as maars, waterfalls, and lava bombs. These natural features provide diverse opportunities for outdoor activities and exploration.
Last updated: June 24, 2026
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The Ulmen Maar lies 420 meters above sea level today, covers an area of 5.5 hectares, and is 36 meters deep. The bubbles at the maar's edge demonstrate that volcanism is still active. They bear witness to a turbulent past—but rest assured, there's no eruption in sight! A wall of various rocks and ash, up to 20 meters thick, surrounds the cone. For those interested, these testimonies to this explosive past are beautifully displayed in St. Matthias Church. This unique wall, with its different colored layers and rounded inclusions, is worth seeing for more than just geologists. The slopes of the maar basin are covered with a beautiful forest, which can be explored on a circular walk. A detour to the medieval castle ruins, from which the Crusaders once launched their campaigns, is recommended. The view from the crater rim over the maar and the Eifel beyond will take your breath away. Whether after a sweaty hike or a long drive, the blue of the Ulmer Eifel lake is all too tempting in summer. However, bathing in the maar is prohibited because it is designated as a nature and water protection area.
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The lower castle has completely disappeared. You can still see the beginning of the ring that connected the lower castle and the Ulmen city wall, a two-story outer wall of the palace, as well as a cistern and some foundation walls of other buildings. The old part of Ulmen Castle was built around 1074 AD and likely rests on the remains of a Roman settlement. In the Middle Ages, Ulmen Castle was further expanded and divided into the upper castle, whose remains of the walls still exist, and the lower castle, which extended to the banks of the maar river. Two knightly families lived in the castle, which is believed to have never been attacked or destroyed until 1673 due to its size. Only the Sun King's troops succeeded. It was rebuilt, but fell again in 1689 during the War of the Succession. However, Ulmen Castle was also rebuilt this time, with only the city wall being abandoned. With the invasion of Napoleon's soldiers, Ulmen also became French and later Prussian. The empty castle, whose last descendant died in 1801, was auctioned to a merchant from Cochem, who sold it as a quarry. When a devastating fire burned Ulmen to the ground in the 19th century, the residents of Ulmen rebuilt their houses with stones from the castle. That's why you can still see a coat of arms on some of the stables today. It wasn't until the early twentieth century that Ulmen Castle was declared a listed building and became the property of the municipality of Ulmen. The castle is always freely accessible.
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The Ulmener Maar is small but beautiful. Located in the middle of the Eifel and in the middle of the city, it is a wonderful destination. You can easily combine a walk around the maar with a walk around the neighboring Jungferweiher. Both have recently been connected by the Ulmener Maar tunnel, which runs under the A 48 motorway.
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The egg-shaped ejected particles are 6 cm or larger and deform the layers of earth when impacted. They are clearly visible here on the rock walls.
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A visit is worthwhile both in summer and in winter. However, the Ulmener Maar is a nature reserve, which is why bathing is strictly forbidden here!
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Here the Endertbach falls 7 meters to the valley. The waterfall, the so-called "Rausch", is next to the old mills the most beautiful highlight of our hike through the Enderttal. Really worth seeing.
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The upper castle was built on a slope above the Ulmen maar, while the lower castle (also called lower castle) was adjacent but below it. The exact time of construction is not known, but it is assumed that the upper castle was built around the year 1000. It was first mentioned in a document in 1074. The ruins of the upper castle are owned by the municipality of Ulmen and in 1913 were listed as a historical monument. It is freely accessible and there are regular events on its premises, including an annual medieval market on the last weekend in June. Source: Wikipedia
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Beautiful waterfall in the valley. Nice place to take a break.
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The region around Horperath, particularly the Vulkaneifel, is characterized by its unique volcanic geology. You can explore fascinating formations like the Boos Lava Bomb, where explanatory panels provide insight into the geological history and the shifting of soil layers. The area is also known for its volcanic maars and waterfalls, reflecting its rich volcanic heritage.
Yes, the Ulmener Maar is a must-see. It's considered the youngest maar in the Eifel, formed approximately 10,900 years ago by Germany's last volcanic eruption. It holds significant geological importance, featuring a distinctive wall of volcanic ejecta and offering a circular route for exploration. While swimming is prohibited, you can enjoy the scenic views and learn about its formation.
For breathtaking panoramic views, consider visiting the Boos Eifel Observation Tower. From here, you can often see the Nürburgring, the Hohe Acht, and the Doppel-Maar on a clear day. The path to the tower often goes through forests, offering a pleasant walk.
Many natural monuments in the area are suitable for families. For instance, the Rausch Waterfall is a very pretty sight and a great place for a short rest, where children can enjoy the rushing water. The Boos Lava Bomb also offers an interesting educational experience for families with its geological explanations.
The region offers diverse outdoor activities. You can find numerous hiking trails, such as the 'View of the Jungferweiher – Ulmener Maar Tunnel loop' or 'XXL Bench, Vulkaneifel – Afelskreuz and Chapel loop'. For cycling enthusiasts, there are routes like the 'Weinfelder Maar viewpoint – View of the Schalkenmehrener Maar loop'. You can explore more options for hiking, cycling, and gravel biking around Horperath.
The natural monuments around Horperath can be enjoyed throughout the year, each season offering a different charm. Spring brings lush greenery and blooming flora, while summer is ideal for longer explorations. Autumn showcases vibrant fall colors, and even winter offers unique experiences, especially for those who enjoy tranquil, crisp walks through the volcanic landscape.
Yes, the Ulmener Maar is not only a geological wonder but also has historical significance. A medieval castle ruin sits on its southern edge, adding a historical dimension to the natural site. Additionally, the Upper Castle of Ulmen offers beautiful views and is often part of tours around the maar.
Yes, Horperath is known for its waterfalls. The Rausch Waterfall is a popular spot, offering a very pretty sight as it rushes down a few meters over thick stones. It's a great place to pause and enjoy the natural surroundings.
The Ulmener Maar is highly significant because it is the youngest maar in the Eifel region, formed by Germany's last volcanic eruption approximately 10,900 years ago. It has been recognized by the International Union of Geological Sciences (IUGS) as one of 100 global 'geological heritage sites' for being a prime example of maar formation through phreatomagmatic eruptions. Its up to 20-meter-thick wall of various rocks and ashes visibly testifies to its explosive past.
Yes, for the Ulmener Maar, there is a popular circular route that allows visitors to explore the forest and admire the geological formations from the crater rim. Many hiking routes in the region are also designed as circular walks, such as the 'View of the Jungferweiher – Ulmener Maar Tunnel loop' mentioned in the hiking guide.
Visitors frequently appreciate the unique geological insights provided by sites like the Boos Lava Bomb, where explanatory panels make the earth's history tangible. The scenic beauty and opportunities for peaceful breaks at spots like the Rausch Waterfall are also highly valued. The panoramic views from observation points like the Boos Eifel Observation Tower are often highlighted as fantastic experiences.


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