Caves around Groß Niendorf are primarily associated with the unique geological formation of the Kalkberg in Bad Segeberg, located within the Segeberg district of Schleswig-Holstein. This area is recognized for its natural features, including the Kalkberg, which stands as a significant natural monument. The region offers insights into unusual geological characteristics and serves as a habitat for wildlife, particularly bats. Visitors can explore these natural attractions, which contribute to the local landscape and provide educational experiences.
Last updated: June 28, 2026
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Exploring the cave is only possible as part of a guided tour.
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The cave is open to visitors in summer. In winter (from October to March), absolute
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The famous Bat Cave (Kalkberghöhle) in Bad Segeberg is the largest natural winter roost for bats in Central Europe. It is located directly beneath the Segeberger Kalkberg.
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The bat cave with the attached exhibition -Noctalis- is definitely worth a visit for young and old alike. The best time is in April, as some bats are still flying around in the cave. In summer, they have left their winter quarters and return in autumn. Please check the opening hours on the website.
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Unfortunately, the now visible part of the Kalkberg is only a sad remnant of the once imposing hill, upon which once stood one of the few hilltop castles in Northern Germany. How different would the town's (tourist) development have been if there had been no intensive limestone mining and gypsum extraction, no Thingstätte (place of worship), and no Karl May Festival? A local historian and Hamburg's Hafencity University have undertaken a joint project on the Kalkberg and the Siegesburg castle on it, taking a virtual journey back in time to the era before both disappeared. A foretaste of the impressive result of this collaboration can be seen here: https://www.kreismuseum-segeberg.de/se1644/.
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Wild West feeling in the north. Saloons, restaurants, souvenirs.
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Tip: The evening Karl May events end with fireworks.
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Tip: The 91 m high limestone mountain is not made of lime (calcium carbonate) but of gypsum (calcium sulphate).
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The primary cave attraction in the region is the Kalkberg in Bad Segeberg. This unique natural monument is home to the Kalkberg Caves, which are known for their geological characteristics and as a significant bat habitat. Adjacent to it is the Noctalis Bat Centre Bad Segeberg, offering an educational experience about bats.
Yes, the Kalkberg Caves and the Noctalis Bat Centre in Bad Segeberg are considered family-friendly. The bat exhibition at Noctalis provides an engaging and educational experience for all ages, and the guided tours through the caves are accessible.
The Kalkberg itself is a unique geological formation, being the only rock mountain in its wider area. Inside the caves, you'll encounter distinctive geological characteristics. From the Kalkberg, you can also enjoy panoramic views of Bad Segeberg and the surrounding landscape, including Lake Segeberg.
The Kalkberg Caves are a crucial bat habitat, particularly for winter hibernation. Therefore, the caves are completely closed during the winter half-year. For the best chance to see bats, visitors suggest April, as some bats may still be flying around. During the summer half-year, the caves are only accessible with a guide. Always check the official opening hours before planning your visit.
Yes, the Kalkberg Caves are only accessible with a guide during the summer half-year. These guided tours offer insights into the history of the mountain, the geological formation, and the animal inhabitants, especially the bats. The Noctalis Bat Centre also provides supervised experiences.
The Noctalis Bat Centre is dedicated to educating visitors about bats. You can learn a lot about these animals, their lives, and their importance to the ecosystem. The center often allows visitors to observe bats live, making it a unique educational experience.
Beyond exploring the caves, the area around Groß Niendorf offers various cycling opportunities. You can find numerous routes for different sports:
Visitors frequently highlight the fantastic views from the Kalkberg, especially on clear days, offering a panorama of Bad Segeberg and Lake Segeberg. The unique geological aspect of the mountain, being the only one of its kind in the region, is also a significant draw. The educational experience at the Noctalis Bat Centre and the guided cave tours are also highly praised.
Yes, the Kalkberg has historical significance. The display walls at the cave keeper's house provide information about the history of the mountain, including the Siegesburg, a castle that was destroyed in 1644. The area is also known for its open-air theatre, which hosts the Karl May plays, adding a cultural and historical dimension to the visit.
The Kalkberg Caves are generally accessible through guided tours, making them suitable for beginners. The focus is on education and observation rather than technical caving. The tours are designed to be informative and safe for a general audience, including families.


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