Best natural monuments around Dannau are found in Schleswig-Holstein, Germany, a region characterized by its serene landscape of lakes, forests, and rolling hills. Situated on the edge of the Holstein Switzerland Nature Park, Dannau offers access to protected areas and unique natural features. This municipality provides a setting for exploring diverse natural monuments.
Last updated: August 17, 2026
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On the mirror-like surface of the lake, the shadows of the trees danced, while on the opposite shore, the first lights of the houses twinkled like tiny stars. A rowboat, moored all day, rocked almost imperceptibly. In that moment, time seemed to stand still, and the Dieksee became the perfect place to let the day end in peaceful serenity.
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The Dieksee is a lake in Holstein Switzerland. It covers 386 hectares, has a maximum length of approximately 3.4 km and a maximum width of 1.6 km. The lake is up to 38 m deep and lies approximately 22 m above sea level. The Schwentine River flows through it from east to west.
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A small narrow bridge
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Discover Holstein Switzerland from the water Come aboard the white fleet and discover the unique natural landscape of Holstein Switzerland! On the beautiful 5-Lakes Cruise or Kellersee Cruise, you'll experience Holstein Switzerland from a completely new perspective. Lake cruises are an experience not only on warm summer days, but also in inclement weather. On our heated boats – some with catering – even the dreariest rainy day can be enjoyed.
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The Janusallee pier is within walking distance of the Wonderworld of Water on the Kellersee promenade. The "Janusallee" pier is used by the Kellersee cruise on the journey from Malente to Sielbeck-Uklei. It is located in the immediate vicinity of the children's playground on Janusallee and the Wonderworld of Water on the Kellersee promenade. Parking spaces with public restrooms are just a few minutes' walk away. Passengers boarding here purchase their tickets for the Kellersee tour aboard the MS Luise.
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Ponds located in the Diekseeholm forest area, which were formerly used for fish farming. These natural attractions in Malente were created in 1869 for the breeding of noble fish. The ponds are fed by fresh spring water from the "Diekseeholm" forest area. They are connected to each other by small streams and channels. The ponds get their name because the surrounding trees are particularly beautifully reflected in the calm, smooth water. In the immediate vicinity of the Spiegelteiche (Mirror Ponds) is one of Malente's Kneipp facilities: a natural water treading pool and an arm-kneading pool.
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This lake also offers great opportunities for anglers. You can catch eels, perch, bream, pike, tench, zander, carp, roach, rudd, and burbot. For further important information and legal regulations regarding this fishing area, as well as for fishing permits, please contact: Schwarten Fishing Tenant Kellerstraße 52 23714 Bad Malente-Gremsmühlen Tel.: +49 4523 3563
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Kellersee borders Malente to the east. It has a total area of approximately 50.6 hectares and a maximum depth of approximately 27 meters. A 14.6 km hiking trail surrounds the lake, including several highlights along the way. These include, for example, the "WunderWeltWasser" nature trail for all ages and the Rothensande estate, the original setting for the Immenhof films. Kellersee can be explored by both excursion boats and sailboats. Canoe trips from Eutin-Fissau are also possible, and there is also a swimming area here. Other swimming areas can be found in Wöbbensredder or at Hamburger Strand in Sielbeck. The swimming areas in Sielbeck and Fissau are unguarded. Anglers also have plenty of opportunities here, as the lake has a good population of zander, pike, and sea bass. Numerous waterfowl can also be observed here. This lake also offers great opportunities for anglers. You can catch eels, perch, bream, pike, tench, zander, carp, and others 🐟
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Beyond the popular spots, the Sehlendorfer Binnensee Nature Reserve offers adventurous crossings over narrow wooden bridges and a beautiful natural environment. Another significant site is the Dannauer See und Umgebung Nature Reserve, a protected area within Dannau itself, known for its shallow kettle lake and diverse ecology. A short distance away, near Eutin, you can find the ancient Bridegroom's Oak, famous for its unique romantic tradition.
Yes, several natural monuments are suitable for families. The Sehlendorfer Binnensee Nature Reserve, Kellersee — Lakeside view at Sielbeck, and Mirror Ponds and Kneipp Pool, Malente are all listed as family-friendly. The Dannauer See Nature Reserve also features an easy one-hour circular hiking trail, perfect for families to explore the diverse flora and fauna.
The Dannauer See Nature Reserve is an important breeding and resting ground for water birds, including common goldeneyes, great crested grebes, and gadwalls. Marsh harriers hunt and breed here, and with patience, you might spot kingfishers and stonechats. The songs of nightingales and marsh warblers are common, and the majestic white-tailed eagle is occasionally seen. The reserve is also home to rare species like the European fire-bellied toad and tree frogs.
Absolutely. The Dannauer See Nature Reserve has a designated one-hour circular hiking trail. For more options, you can explore various routes, such as the "Dannauer Lake – Dannau Village loop" which is an easy 3.7 km hike. You can find more hiking opportunities in the area on the Hiking around Dannau guide.
The Bridegroom's Oak, located in the Dodauer Forst near Eutin, is an ancient tree over 500 years old. It's famous for a unique tradition: it serves as a public letterbox for people seeking love partners. Since 1892, individuals have been leaving and reading letters in a knothole in its trunk, a tradition that has reportedly led to over a hundred marriages. The German postal service even delivers letters directly to the tree.
Yes, some natural monuments are dog-friendly. For example, the Kellersee — Lakeside view at Sielbeck is listed as dog-friendly. When visiting nature reserves, it's always best to keep dogs on a leash to protect wildlife and ensure a pleasant experience for all visitors.
The natural monuments around Dannau offer beauty throughout the year. Spring is vibrant with yellow-blooming water irises at Dannauer See. Summer brings purple loosestrife, meadowsweet, and fields of water lilies. Autumn offers beautiful foliage in the surrounding forests. Birdwatching is excellent in spring and autumn during migration periods. The Bridegroom's Oak can be visited year-round.
Yes, the Dannauer See Nature Reserve features a designated one-hour circular hiking trail that is easy to navigate. Additionally, the "Dannauer Lake – Dannau Village loop" is an easy 3.7 km hike, perfect for a relaxed stroll. The Mirror Ponds and Kneipp Pool, Malente also offers pleasant, easy paths.
The Sehlendorfer Binnensee Nature Reserve has a relatively new vantage point offering beautiful views of the inland lake and bird breeding grounds. The Kellersee — Lakeside view at Sielbeck also provides scenic views of the lake in Holstein Switzerland. The north shore of the Großer Eutiner See offers a more secluded forest experience with glimpses of the lake.
The Dannauer See is a classic "Toteissee" or kettle lake. It was formed during the last ice age when melting glaciers left behind buried ice blocks. These blocks later thawed, causing the overlying sediment to collapse and fill with groundwater, creating the lake's distinct, largely circular shape and shallow depth.
Yes, the region around Dannau offers various cycling routes. For example, you can find easy cycling tours like the "St. Johannis Church Neukirchen – Malenter Au Nature Reserve loop" which is about 17 km. More cycling options are available in the Cycling around Dannau guide.
The Sehlendorfer Binnensee Nature Reserve is known for its almost adventurous crossings over narrow wooden bridges and its beautiful, wild natural environment. It features a vantage point with views of the Sehlendorf inland lake and important bird breeding grounds, making it a great spot for nature observation and photography.
While the natural monuments themselves are primarily undeveloped, the surrounding towns and villages like Dannau and Malente offer amenities. For instance, the Mirror Ponds and Kneipp Pool, Malente has a covered rest area. For cafes and accommodation, you would typically find options in the nearby municipalities.


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