Best caves in Föhrenberge Nature Park are situated within the scenic Vienna Woods, an area known for its distinctive umbrella-shaped black pines and extensive dry grasslands. While the park itself is primarily a hiking destination, the broader region around Bezirk Mödling features notable underground attractions. These include natural rock formations and grottoes, offering diverse experiences for explorers. The area provides a blend of natural beauty and accessible subterranean features.
Last updated: May 26, 2026
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Höllensteinlucke: Best viewed from the hiking trail. Luckily there are 4 routes
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First, you walk through a low tunnel far into the mountain, where you are finally given a detailed explanation of the working conditions in former times and what happened in the tunnel during the Second World War, including the construction of the first fighter jet. After the mine tour, you continue a bit further down to the largest underground lake in Europe, where you take a short boat trip. The lake is very clear, the air is great, and the lighting is also very beautiful to look at. We went to the Seegrotte purely by chance and were lucky enough to get a private tour, as apparently no one else wanted to visit the grotto at lunchtime. Our guide was very nice, explained everything in great detail, and in the end, we were even allowed to do two laps on the lake.
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The Grotto of Mary is located on a forest clearing below ground level, the entrance is secured with posts or a small concrete wall, the interior of the grotto is largely natural. At the entrance there is a small table and a seat, a small bell can be rung by pulling a cord. On the right side of the grotto is a painted statue of the Virgin Mary, modeled after Gothic madonnas, protected above the entrance by a wooden gable roof, a carved, unframed figure of the Virgin Mary in the style of the mantle madonnas.
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Höllensteinlucke – the breather for altitude heroes 😅 Are you on your way to the Höllensteinhaus, panting like a broken vacuum cleaner and wondering if you're lost? Don't worry – you've arrived at the Höllensteinlucke! 🎉 This legendary "lucke" isn't a magical portal, but simply a small cut in the terrain – but for tired hiking legs, it feels like a gift from the Vienna Woods. 🌲✨ Here you can take a short breather, question your existence, and mentally prepare for the final climb. Because from here on, things get tough again – but hey, you're not here for fun. Or are you? 😄
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Leiwander Trail is slippery when wet. Sometimes blocked by trees.
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The Grotto of the Virgin Mary is located in a forest clearing below ground level, the entrance is fenced off or secured with a small concrete wall, the interior of the grotto is largely natural. At the entrance there is a small table and a place to sit, a small bell can be rung using a cord. On the right side of the grotto there is a painted statue of the Virgin Mary based on the model of Gothic Madonnas, above the entrance protected by a wooden gable roof, a carved, unpainted figure of the Virgin Mary in the style of the protective cloak Madonnas. Various pictures have been placed inside the grotto.
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The Matterhörndl is a small but impressive rock in the Vienna Woods that is perfect for a short rest. It is a little hidden away from the main path and easy to miss, but it is worth the visit. With a small opening through and the opportunity to climb around a bit, it is a mystical place for photographers, children and nature lovers. I visited this mountain as part of my Dwarf Mountain Tours series. My goal is to climb every mountain in the Vienna Woods. Find my tours here: https://www.komoot.com/de-de/collection/2517195/-zwergbergtouren-im-wienerwald
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The Seegrotte Hinterbrühl is a former gypsum mine near Vienna that has become a show mine and a popular attraction. The Seegrotte has an eventful history, ranging from mining to the Second World War to a film set. The main attraction is the largest underground lake in Europe, where you can take a romantic boat trip. The sea grotto is open all year round and is a unique experience whatever the weather.
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The region around Föhrenberge Nature Park offers a blend of natural rock formations, grottoes, and a unique underground lake. The most prominent is Seegrotte Hinterbrühl, known as Europe's largest underground lake, formed from a former gypsum mine. Other features include smaller grottoes like Höllensteinlucke Cave, which serves as a natural rock shelter for hikers.
Yes, the Seegrotte Hinterbrühl is a site of historical significance, being a former gypsum mine that transformed into an underground lake after a mining blast in 1912. It also houses a mine museum. Additionally, the Frauenstein Cave near Mödling, while smaller, is part of a historically notable rocky outcrop with a summit cross.
Yes, some cave experiences are family-friendly. Seegrotte Hinterbrühl, with its boat rides on the underground lake, is a popular choice for families. The Matterhörndl, a natural monument with a small opening to explore, is also considered family-friendly and offers opportunities for children to climb.
Beyond the caves themselves, the Föhrenberge Nature Park is characterized by its distinctive umbrella-shaped black pines and extensive dry grasslands. You can also find natural rock formations like the Matterhörndl, and the unique underground lake at Seegrotte Hinterbrühl. The broader park is known for diverse flora and fauna, including endangered ground squirrels on the Perchtoldsdorfer Heide.
The underground environment of caves like Seegrotte Hinterbrühl maintains a consistent temperature year-round, making them suitable for visits in any season. For exploring the surrounding Föhrenberge Nature Park and its outdoor trails leading to smaller grottoes, spring and autumn offer pleasant weather for hiking. Summer is also good, but can be warmer, while winter visits might require appropriate gear for snowy or icy conditions on trails.
Yes, many of the caves and grottoes are accessible via hiking trails within the Föhrenberge Nature Park. For example, the Frauenstein Cave is reached via a hiking trail from the Black Tower. The Höllensteinlucke Cave is a well-known resting spot for hikers. You can find various hiking routes in the area, including those listed in the Mountain Hikes in Föhrenberge Nature Park guide.
The Föhrenberge Nature Park offers a wide range of outdoor activities. Besides exploring caves, you can enjoy extensive hiking, with options for various difficulty levels, as detailed in the Mountain Hikes in Föhrenberge Nature Park guide. There are also numerous Running Trails and even Waterfall hikes in the broader region.
While the Föhrenberge Nature Park itself is generally dog-friendly for outdoor trails, specific cave attractions like Seegrotte Hinterbrühl may have restrictions on pets due to the nature of the tour (e.g., boat rides, confined spaces). It's advisable to check directly with individual cave operators regarding their pet policies before your visit. Smaller, open grottoes along hiking trails are typically more accessible with dogs.
Visitors particularly appreciate the unique experience of the Seegrotte Hinterbrühl, especially the mystical atmosphere of the underground lake and boat rides. The Matterhörndl is loved for its impressive rock formation and the opportunity for a short rest and exploration. The Höllensteinlucke Cave is valued as a convenient resting and shelter spot for hikers.
Yes, the Föhrenberge Nature Park and the surrounding district of Mödling offer various amenities. Near Seegrotte Hinterbrühl, you will find facilities for visitors. Along the hiking trails, especially near popular spots or trailheads, there are often traditional Austrian inns (Heurigen) or cafes. For example, the Perchtoldsdorfer Heide, a part of the park, is known for its amenities.
The Föhrenberge Nature Park is located within the Vienna Woods, south of Vienna. Seegrotte Hinterbrühl is easily accessible by car and public transport from Vienna. For other caves and grottoes within the park, access often involves driving to a trailhead and then hiking. Public transport options, such as buses, connect various towns in the Mödling district to hiking starting points. Parking is generally available near popular attractions and trailheads.
The Mariengrotte Hinterbrühl offers a peaceful and reflective experience. It's a small, largely natural grotto located in a forest clearing, featuring a statue of the Virgin Mary. Visitors appreciate its quiet atmosphere and the opportunity for contemplation. It can be reached via a short, scenic trail and is considered a space for reflection.


Extend your search for the best caves by checking out these guides of the top ones in Föhrenberge Nature Park: