Best caves around Rainau are found in the surrounding region, as Rainau itself is primarily known for its recreation area, Rainau-Buch. This area features a reservoir and opportunities for activities such as hiking and cycling. Rainau also holds historical significance with Roman Limes artifacts, including a fort village and a replica of a wooden watchtower. While no notable caves are directly within Rainau, the wider area offers various subterranean attractions.
Last updated: August 20, 2026
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Pastor Franz Josef Fuchs had the Lourdes Grotto built into the northern slope of Hohenberg Mountain. It was consecrated on June 20, 1886. Glass particles from the Rosenberg glass factory can still be seen in the Lourdes Grotto today. Slag stones from the disused glass factory were used as building material, into which various colored glass was melted. The grotto is freely accessible and can be reached via a path northwest of the pilgrimage church of St. James. It is located in a small wooded area directly next to a small pond. Cycling is prohibited, but you can easily push your bike down from Hohenberg Mountain; there are a few steps at the bottom. You can continue by bike from the grotto.
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Pastor Franz Josef Fuchs had the Lourdes Grotto built into the northern slope of Hohenberg Mountain. It was consecrated on June 20, 1886. Glass particles from the Rosenberg glass factory can still be seen in the Lourdes Grotto today. Slag stones from the disused glass factory were used as building material, into which various colored glass was melted. The grotto is freely accessible and can be reached via a path northwest of the pilgrimage church of St. James. It is located in a small wooded area directly next to a small pond. Cycling is prohibited, but you can easily push your bike down from Hohenberg Mountain; there are a few steps at the bottom. You can continue by bike from the grotto.
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short trail, you can also take a few jumps
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Good location, there are many such tunnels here.
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A bit out of the way but easily accessible when the ground is dry. CAUTION when wet.
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Wonderfully beautiful and great for relaxing
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The rock formation here has a large hole. The path down into the valley to Glashütte is quite challenging. A T2 trail. The Hohle Stein in Unterkochen The Hohle Stein lies above Unterkochen-Glashütte on a steep rocky outcrop. It represents a spacious rock hollow, complemented by two cave chimneys leading upwards and a long, very shallow cave passage. This place is also popularly known as the "Hell's Throat," which is quite appropriate, as entering from above is not entirely safe and plunges vertically into the ground, and is only recognized at a later stage. The Hohle Stein is the most famous and legendary cave in Unterkochen, located next to the "Schlossbaufeld" (castle building field) where the Kocherburg castle once stood. Among other things, an old tradition tells us that the Hohle Stein served as a hiding place during wartime, which is quite conceivable, given its well-hidden location on a steep mountain slope, offering protection from bad weather and making it difficult for strangers without good local knowledge to find. The fact that people occasionally stayed at the Hohle Stein is also confirmed by a hearth with a chimney in the rock. Its legendary status and proximity to other attractions, such as sections of the Härtsfeld Railway, the Kocherburg Tunnel, the viaduct, the prehistoric ramparts, and the Kocherburg Castle, make a trip there worthwhile. Source: https://www.aa-history.de/Hohler_stein_Text.html
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The descent to the cave is very steep, make sure you are sure-footed
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Around Rainau, you can discover a diverse range of subterranean attractions. These include natural rock formations, religious grottos, and historical visitor mines, offering experiences from geological exploration to cultural insights.
No, there are no notable natural caves directly within Rainau itself. The municipality is primarily known for its recreation area, Rainau-Buch, which features a reservoir and Roman Limes artifacts. However, the wider surrounding region offers various cave-related sites.
Among the most popular cave-related sites near Rainau are the Friedrichshöhle Trail, which leads to a cave, and the Lourdes Grotto, Hohenberg, a unique religious grotto. The Tiefer Stollen Visitor Mine is also highly regarded for its historical experience.
Yes, the Tiefer Stollen Visitor Mine is considered family-friendly, offering a mine train ride 400 meters into the mountain. The Marian Grotto in the Geopark Schwäbische Alb is also noted as family-friendly, providing a contemplative and beautifully maintained spot.
The Tiefer Stollen Visitor Mine is a significant historical site where you can experience a mine train ride and learn about the region's mining past. Additionally, the Hohler Stein Cave has a legendary history as a hiding place during wartime.
Yes, the Lourdes Grotto, Hohenberg is a freely accessible religious building and cave built into the northern slope of Hohenberg Mountain. Another option is the Marian Grotto in the Geopark Schwäbische Alb, a contemplative place often visited for its serene atmosphere.
For those seeking a more challenging experience, the Hohler Stein Cave involves a path down into the valley that is quite challenging, requiring surefootedness, especially when approaching the hole and descending into the cave.
The region around Rainau offers various outdoor activities. You can find numerous routes for gravel biking, MTB trails, and running trails. The Rainau-Buch recreation area also provides opportunities for hiking and cycling.
The Lourdes Grotto, Hohenberg is freely accessible and was built using slag stones from a disused glass factory, with glass particles still visible. It's located in a small wooded area next to a pond. While cycling is prohibited directly at the grotto, you can push your bike down from Hohenberg Mountain.
The Friedrichshöhle Trail is generally an easy trail with small jumps in the upper part. However, it contains a lot of clay soil in the middle section, so good tires and caution are required in wet conditions as it can be slippery.
Yes, the Tiefer Stollen Visitor Mine is known for hosting special events, such as a Christmas market in December, which transforms the mine's tunnels and sandstone halls into a festive experience.
Visitors appreciate the variety of experiences, from the unique historical journey into the Tiefer Stollen Visitor Mine to the serene and contemplative atmosphere of the grottos like Lourdes Grotto, Hohenberg. The natural beauty and the opportunity for outdoor activities on trails like the Friedrichshöhle Trail are also highly valued.


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