Seegrotte: An Underground Adventure
Explore Europe's largest underground lake and discover a hidden WWII aircraft factory in this fascinating Austrian grotto.
Descend into the depths of a former gypsum mine and discover Europe's largest underground lake at the Seegrotte in Hinterbrühl. Explore the fascinating tunnels, ride a boat across the emerald-green lake, and uncover the site's intriguing history, including its use as a secret Nazi aircraft factory during World War II.
A brief summary to Seegrotte
- Grutschgasse 2a, Hinterbrühl, 2371, AT
- +43223626364
- Visit website
Local tips
- Wear warm clothing and sturdy shoes, as the cave temperature is a constant 9°C (48°F).
- Book tickets in advance, especially during summer months and weekends, to avoid long waiting times.
- Photography is allowed, but flash may be restricted to preserve the cave's environment.
- The Seegrotte is an ideal place to visit in bad weather, as it is entirely underground.
Getting There
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Public Transport
From Vienna, take a train to Mödling Bahnhof. From there, take bus line 264 to Hinterbrühl Beethovengasse. The Seegrotte is a short walk from the bus stop. A single bus fare from Mödling to Hinterbrühl costs approximately €3-€15. The train journey from Vienna to Mödling takes approximately 57 minutes.
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Car
From Vienna, take the A21 motorway to Hinterbrühl. Follow signs to the Seegrotte. Parking is available near the Seegrotte, a short walk away. Parking availability may be limited. Be aware that some parking lots may have hourly or daily rates.
Discover more about Seegrotte
Iconic landmarks you can’t miss
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