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North Rhine-Westphalia
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Extertal

Top 9 Caves around Extertal

Best caves around Extertal are found in a region characterized by picturesque landscapes and significant geological formations. While Extertal itself does not feature prominent natural caves, the surrounding area offers unique man-made and natural cave-like structures. The nearby Externsteine, for instance, presents a complex of chambers carved into sandstone, holding deep historical and cultural significance. This area provides a blend of natural beauty and historical exploration, making it a notable destination for those interested in geological and man-made subterranean features.

Last updated: June 26, 2026

Pyrmont Castle

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Pyrmont Castle with its impressive square moat was once the residence of the Count of Spiegelberg and now houses a museum. An imposing building from the outside too.

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Dunsthöhle Bad Pyrmont

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The haze cave is located on the site of a former quarry in which Buntsandstein was broken. When the quarry workers came to a certain depth, they noticed a "haze" …

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You should visit. A nice experience.

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Oberberg Crevice

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A very narrow gap, there you should better not get in there.

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Papenbrink Quarry and Mine Tunnel

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Also very interesting for mountain biking, through the cliffs in the slate, but only for experts.

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Danny aus SHG
November 27, 2025, Oberberg Crevice

The Oberberg fissure in the Weser Uplands is a narrow, natural crevice in the limestone of the Oberberg mountain and is one of the region's geological features. It lies well hidden on a steep slope and resembles a deep, inaccessible crack in the rock less than a cave. Due to its narrow structure, slippery limestone walls, and partially unstable floor, hiking guides advise against entering the fissure. It is precisely this mysterious yet difficult-to-access appearance that makes it such a fascinating place, best viewed from a distance.

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Beautiful facility to linger

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The Haze Cave is unique in Germany. It is located on the site of a former quarry where red sandstone was extracted in the 17th century. Quarry workers noticed a "haze" at a certain depth that caused people to faint. Dead birds were repeatedly found in the pit. Well doctor Dr. Johann Philipp Seip came to Pyrmont in 1712 and investigated the phenomenon. He suspected it was sulfur vapor. Carbon dioxide (CO2) was only discovered a few years later as atmospheric acid. The metal half-shells symbolize the numerous springs in Bad Pyrmont.

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History Count Friedrich VI of Spiegelberg, who had been sovereign of the County of Pyrmont since 1525, built a fortress with a residential building on top in the valley of Pyrmont between 1526 and 1536. As early as 1512, he had the ancestral seat of the Counts of Spiegelberg in Coppenbrügge converted into a contemporary fortress based on the Italian model. He used the experience he gained to build a fortress in Pyrmont as well. The almost square complex covered four and a half hectares and was surrounded by a 30 to 40 meter wide moat, a moat. The earth that accrued when digging the moat was piled up to build the castle wall with casemates incorporated into it. In the north, where the fortress was most vulnerable to attack, a small stone corner bastion was built. The entrance to the fortress was only accessible via a wooden drawbridge and the entrance tunnel was.

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Directly adjacent to the spa park is the Bad Pyrmont moated castle (or vice versa?!) The castle, which still exists today, dates back to the 18th century and was the summer residence of the Counts of Waldeck-Pyrmont.

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The café in the castle courtyard is not as busy during the week, so you can better enjoy the view of the park.

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Tip: small café in the castle courtyard with a view of the spa gardens. Relax and enjoy.

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Lars150961
February 19, 2024, Schloss Pyrmont

Pyrmont Castle was the residence or summer residence of the Counts of Spiegelberg and the Counts of Waldeck-Pyrmont in what is now Bad Pyrmont. The existing building dates from the 18th century. Today it houses a museum. The castle is part of the 16th century Pyrmont Fortress.

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Frequently Asked Questions

What kind of subterranean sites can I explore around Extertal?

The region around Extertal offers a unique blend of man-made and natural subterranean features. You can find historical cave complexes, such as the Externsteine with its carved chambers, and unique geological sites like the Dunsthöhle Bad Pyrmont, known for its natural carbon dioxide emissions. There are also man-made tunnels like the Papenbrink Quarry and Mine Tunnel.

Are there any historically significant caves or rock formations in the area?

Yes, the Externsteine are a highly significant historical site. This striking sandstone formation features man-made caves and carvings, with evidence suggesting spiritual use since pre-Celtic times. By the 12th century, it served as a Christian place of worship and dwellings for hermits, featuring a notable relief carving of the "Descent from the Cross".

What is the Dunsthöhle Bad Pyrmont known for?

The Dunsthöhle Bad Pyrmont is unique for its natural carbon dioxide emissions. Visitors can experience the unusual properties of the CO2 gas, which is heavier than air and creates a distinct atmosphere. This phenomenon has fascinated visitors since the 18th century.

Is the Papenbrink Quarry and Mine Tunnel accessible to visitors?

The Papenbrink Quarry and Mine Tunnel is a man-made site featuring a mine tunnel that maintains a constant cool temperature, even on hot days. It's also noted for its views of the Papenbrink and an old quarry. It can be reached on foot via the hiking car park in the hairpin bends from Todenmann to Kleinenbremen.

Are there any natural crevices or geological features to explore?

Yes, the Oberberg Crevice is a narrow natural monument that offers an interesting geological feature for those exploring the area. It's a challenging spot due to its narrowness, so caution is advised.

What outdoor activities can I do near these caves?

The region around Extertal offers various outdoor activities. You can find numerous MTB Trails, with routes like the 'Steinberg Viewpoint (Former Missile Base) – Sternberg Castle loop from Silixen'. There are also many easy hikes, such as the 'View of the Sunntigrain Valley – Bürgerwald Extertal loop from Heimbachtal', and gravel biking routes like the 'Rintelner Straße Scenic Path – Panoramic cycle path near Borlefzen loop from Mühlenberg'.

Are the caves around Extertal suitable for families?

Many of the sites, such as the Dunsthöhle Bad Pyrmont and the Externsteine, are considered family-friendly. The historical and geological aspects can be engaging for children, especially with guided tours available at some locations. The surrounding natural areas also offer opportunities for family-friendly walks.

What is the best time of year to visit the caves and rock formations?

The Externsteine and other outdoor sites are enjoyable year-round, with spring and autumn offering pleasant temperatures for hiking and exploration. The unique properties of the Dunsthöhle Bad Pyrmont's CO2 gas can be experienced in different ways depending on the season, as its temperature response varies between summer and winter.

What do visitors enjoy most about the caves and sites near Extertal?

Visitors frequently appreciate the rich history and unique geological features. The Externsteine are praised for their cultural significance and scenic beauty, while the Dunsthöhle Bad Pyrmont offers a fascinating natural phenomenon. The Papenbrink Quarry and Mine Tunnel is noted for its cool temperatures and views. The komoot community has shared over 710 photos and given more than 760 upvotes for these sites.

Are there any castles or historical buildings near the cave sites?

Yes, Pyrmont Castle is located nearby. This impressive castle, with its square moat, was once the residence of the Count of Spiegelberg and now houses a museum. It's an imposing building from the 18th century and part of the 16th-century fortress Pyrmont.

Are there any specific regulations for visiting the Dunsthöhle Bad Pyrmont?

The Dunsthöhle Bad Pyrmont can only be visited with a guided tour. These tours are highly recommended for their interesting explanations of the unique CO2 phenomenon.

Where can I find information about parking or public transport to these sites?

For the Papenbrink Quarry and Mine Tunnel, there is a hiking car park available in the hairpin bends from Todenmann to Kleinenbremen. For other sites like the Externsteine and Dunsthöhle Bad Pyrmont, it's advisable to check local tourist information for specific parking and public transport options, as these can vary.

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

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