Best natural monuments around Mosbruch are found in the Vulkaneifel district of Germany, an area shaped by its volcanic past. This region features unique geological formations such as maars, which are former volcanic craters, and offers insights into the area's ecological significance. The landscape provides diverse opportunities for exploring natural and historical sites.
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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When you think of Nürburg, you only think of fast cars and tight corners? Then you're not familiar with the castle ruins of the same name. Nürburg was founded before 1166, probably by the Counts of Are. Characteristic slate-covered conical roofs mark the silhouette of the castle, visible from afar. Not only the view from the mighty keep is worth a visit, but also the impressive remains of the former castle complex, which was expanded in several so-called "growth rings." You can find more detailed information about Nürburg here: https://kulturerbe-eifel-mosel.de/nuerburg
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The Nürburg is the highest castle in Rhineland-Palatinate (676.5 m above sea level). It was built on a basalt, weathered volcanic vent. The basalt rock gave the mountain and the castle their name: Mons Nore, the black mountain. He also supplied the building materials for the castle. When the weather is clear, the keep (39 m high) offers a fantastic panoramic view of the entire Eifel, but also of the heart of the “Green Hell”, the Nordschleife, which winds its way through the woods around the castle.
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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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The natural monuments around Mosbruch are primarily defined by the region's volcanic past. You'll find unique geological formations such as maars, which are former volcanic craters, and significant bogs. These sites offer a fascinating glimpse into the area's geological history and ecological importance.
The Mosbrucher Weiher, also known as the Mosbrucher Maar, is a highly significant natural monument. It's one of the youngest and third largest dry maars in the West Eifel, showcasing the region's explosive volcanic history. Ecologically, its bog is a designated nature reserve, providing a crucial habitat for rare plants and animals and contributing to climate protection by storing CO2. Historically, it was used for fishing ponds in Roman times and peat cutting.
Yes, several natural monuments offer excellent views. The Boos Eifel Observation Tower provides a fantastic panoramic view of the Eifel, including the Nürburgring and Hohe Acht. From the 20-meter-high donjon of Nürburg Castle, you can also enjoy a great panoramic view of the surrounding Eifel landscape.
Beyond the natural wonders, the region boasts rich historical context. Nürburg Castle, built on basalt rock, is a prominent historical site. The Upper Castle of Ulmen, located near the Ulmener Maar, also offers historical insights and great views. The Mosbrucher Weiher itself has historical ties, with evidence of Roman facilities on the nearby Hochkelberg and historical use of the maar's water.
Yes, several natural monuments are suitable for families. The Boos Lava Bomb is recommended for families, offering interpretive panels about geological history. The Ulmener Maar and the Upper Castle of Ulmen are also considered family-friendly, providing opportunities for exploration and nature observation.
The area around Mosbruch offers diverse outdoor activities. You can find numerous hiking trails, including moderate routes like the 'Mosbruch Pond – View from Hochkelberg loop from Mosbruch' or easier options like the 'Sassener Cross – Mosbruch Pond loop from Mosbruch'. For cycling enthusiasts, there are gravel biking and road cycling routes available. Explore more options on the Hiking around Mosbruch or Gravel biking around Mosbruch guide pages.
The Eifel region, including Mosbruch, is beautiful year-round. Spring and autumn offer pleasant temperatures for hiking and nature observation, with vibrant foliage or blooming landscapes. Summer is ideal for longer days outdoors, while winter can provide a unique, tranquil experience, especially around sites like the Mosbrucher Weiher, though some facilities might have reduced opening hours.
Yes, the Mosbrucher Weiher is an excellent spot for wildlife observation. As a designated nature reserve, its bog habitat supports rare plants and animals. With some luck, visitors can spot rare birds like the snipe, red-backed shrike, and red kite from the crater rim. Ongoing renaturation efforts also support the reintroduction of typical bog flora and fauna.
Yes, there are forest and field paths that allow you to explore the area around the Mosbrucher Weiher. A circular trail features interpretive stations providing information about the maar's formation and its inhabitants. To protect the sensitive ecosystem of the bog, visitors are guided by carefully laid-out gangplanks.
Visitors frequently praise the stunning panoramic views from spots like the Boos Eifel Observation Tower and Nürburg Castle. The geological insights provided by sites like the Boos Lava Bomb, with its explanatory panels, are also highly appreciated. The tranquility and unique natural beauty of the maars, such as the Ulmener Maar, are often highlighted as well.
The Ulmener Maar is generally accessible for visitors, offering a chance to see one of the youngest maars in the Eifel. It's surrounded by a tuff rock wall and features the ruins of a knight's castle on its southern edge. The nearby Jungferweiher, a silted-up maar, has been re-watered and now serves as a bird sanctuary, attracting nature enthusiasts and anglers.
The Boos Lava Bomb is a fascinating natural monument and a testament to the region's volcanic activity. It's an impressive site where explanatory panels detail the shifting of soil layers, offering a direct insight into the geological forces that shaped the Eifel. It's a recommended stop for those interested in earth history and is considered family-friendly.


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