Just about 1.5 hours northwest of the capital, a little piece of Scandinavia awaits you in the heart of the Waldviertel: the Ottenstein Reservoir. With its densely forested shores and deeply indented coves, it offers the perfect setting for your next getaway.
And here’s a little tip: If, after visiting the Lichtenfels Castle Ruins, you find yourself wishing you could have experienced the past in its heyday, be sure to check out this VR journey through time!
🌊 The Gigantic Ottenstein Dam

The centerpiece of this water paradise is the impressive, 69-meter-high, arched Ottenstein Dam. Built in the 1950s as part of the Kamp hydroelectric power plant project, it tamed the wild Kamp River and created this picturesque lake landscape.
A walk right along the crest of the dam is an absolute must. The contrast couldn’t be greater: on one side, you look down into the dizzyingly deep Kamp Gorge; on the other, the vast waters of the lake glisten.
🏰 Pure mystique: The Lichtenfels Ruins

Set amidst this idyllic backdrop, the Lichtenfels Ruins sit enthroned on a picturesque peninsula. The stone remains of this hilltop castle date back to the 12th century and exude a wonderfully mystical atmosphere. They bear witness to a time when minstrels and knights still called this place home.
Rent an electric boat, pedal boat, or rowboat at the lakeside restaurant and head toward the Lichtenfels Ruins from the water! The journey across the lake will make you feel like you’re on a real expedition. Alternatively, beautiful, shaded hiking trails lead through the forest to the ruins.
Important: The ruins can only be viewed from the outside!
🎒 Practical Tips for Your Trip to the Ottenstein Reservoir

To ensure your trip from the Vienna Basin to the Waldviertel goes smoothly, here are the most important facts:
- 🚗 Best way to get there: Driving from Vienna offers the most flexibility. Take the A22 and the S5 to Krems an der Donau, then follow the B37 toward Zwettl/Rastenfeld. After just under 1.5 hours, you’ll arrive in paradise.
- 🛶 Boat Rentals & Swimming: The boat rental at the Ottenstein Lake Restaurant is the absolute “place to be.” On hot weekends, get there first thing in the morning—the boats are in high demand! You’ll find great swimming spots along the countless coves.
- 🥾 Packing list: Swimwear, a towel, sunscreen, and definitely sturdy shoes—especially if you want to explore the forest trails around the dam. A picnic basket never hurts either, since the little coves are perfect for a wonderful break.
Pack your swimsuit, leave the hustle and bustle of Vienna behind for a few hours, and immerse yourself in the magic of the Waldviertel!