Best caves in Ostoja Nietoperzy Gór Sowich are primarily man-made underground complexes, as the region contains virtually no natural caves. This Natura 2000 protected area in Poland's Lower Silesian Voivodeship is significant for its bat populations, which utilize inactive mine shafts and historical fortifications as essential shelters. These subterranean structures offer a unique combination of ecological importance as bat refuges and historical context, particularly related to World War II's "Project RIESE." Visitors can explore these sites to understand their historical…
Last updated: July 9, 2026
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Several times a day, a guided tour into the mine shaft is organized. There are props and memorabilia preserved from that time. Additionally, from time to time, there is a film and sound system along the section.
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This object makes an impression. Attention, it is cold and wet inside.
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A huge system of concrete corridors, fortifications and halls. The purpose of the works was kept secret. According to some, it was supposed to be Adolf Hitler's secret headquarters. Others claim that halls were built for underground armament factories to produce secret weapons. The complex is currently open to the public. On free weekends, you can meet crowds of people there. Tickets can be purchased in the parking lot, 300 meters south of the entrance and 500 meters from the exit.
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In memory of the victims, you can also take a tour with Audiogyde here. Very interesting.
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a part of the RISE complex is worth seeing
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One of the fragments of the Riese complex available for visiting. What is especially remembered are the drawings of prisoners of the concentration camp created for the construction purposes. It is a pity that the tunnels are surrounded by a sensational aura and a little forgotten that it was really a German Nazi concentration camp. Tens of thousands of people died while building these tunnels. https://sztolnie.pl/
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The Gontowa complex was part of the Nazi Giant project. Adits stretch about 200 m deep into the Gontowa mountain.
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The Ostoja Nietoperzy Gór Sowich region is unique because it has virtually no natural caves. Instead, you'll find numerous man-made underground complexes, such as inactive mine shafts (adits) and historical fortifications. These structures are significant both for their historical context, particularly related to World War II's "Project RIESE," and as vital shelters for bat populations.
These underground spaces are crucial for the survival of many bat species, including some of Europe's rarest, such as the greater mouse-eared bat and Bechstein's bat. They provide stable temperature and humidity, which are critical for bats to hibernate during colder months when their insect food sources are scarce. The region is a Natura 2000 protected area specifically for these bat populations.
The underground complexes are primarily remnants of World War II's mysterious "Project RIESE." These vast systems of tunnels, bunkers, and halls were constructed by Nazi Germany, with forced labor from concentration camp prisoners. They offer a unique glimpse into the region's wartime history and the immense scale of these secret projects.
You can visit several notable sites. The Osówka Underground City is a well-known part of Project RIESE, featuring a large system of concrete corridors and fortifications. Another site is the Gontowa Complex – Entrance to the Tunnels, which consists of adits stretching about 200 meters deep into Gontowa mountain. Additionally, the Riese WWII tunnel complex offers tours where you can see drawings by concentration camp prisoners.
The best time to visit is generally outside of the winter hibernation period for bats. Disturbing bats during hibernation can be detrimental to their survival. While specific tourist sites like Osówka are open to the public, it's always advisable to check their operating hours and seasonal recommendations. Spring, summer, and early autumn are typically good times for exploration.
Yes, sites like the Osówka Underground City are open to the public and offer guided tours, making them suitable for families interested in history and unique environments. It's recommended to check specific site information for any age restrictions or recommendations for younger children, as the historical context can be somber.
The underground complexes maintain a stable, cool temperature year-round, regardless of the weather outside. It is advisable to wear warm layers, even in summer, and comfortable, sturdy shoes suitable for walking on uneven surfaces. Some areas might be damp.
Yes, for popular sites like the Osówka Underground City, parking is available. For Osówka, tickets can be purchased in the parking lot, which is located about 300 meters south of the entrance. It's always a good idea to check specific site details for parking arrangements before your visit.
Visitors appreciate the unique combination of historical context and the intriguing subterranean environment. Many find the scale of the "Project RIESE" constructions impressive and are moved by the stories of its creation. The cool, stable atmosphere and the opportunity to learn about the region's ecological importance as a bat refuge also contribute to a memorable experience.
The Ostoja Nietoperzy Gór Sowich region offers a variety of outdoor activities. You can explore numerous MTB trails, enjoy scenic mountain hikes, or go cycling through the picturesque landscape. The area is known for its diverse terrain suitable for various skill levels.
Yes, the Ostoja Nietoperzy Gór Sowich region is excellent for hiking. You can find numerous mountain hikes, ranging from easy to difficult. Popular routes include loops around the Orzeł Mountain Hut and trails leading to the Wielka Sowa Observation Tower, offering beautiful views of the Sowie Mountains.
For most of the publicly accessible underground complexes, guided tours are highly recommended, and often mandatory. These tours provide crucial historical context, ensure visitor safety within the complex structures, and help protect the sensitive bat habitats. Sites like Osówka Underground City are primarily experienced through guided tours.

