Natural monuments around Munchhausen, located in Bas-Rhin, France, are found in a region characterized by its position at the confluence of the Sauer and Rhine rivers, bordering Germany. This area offers a diverse natural landscape, including riverine environments, nature reserves, and unique geological formations. The natural features here are shaped by the Rhine river and its historical course, providing habitats for various flora and fauna. Visitors can explore a mix of natural and historically significant sites that highlight the region's…
Last updated: May 24, 2026
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Fascinating inland dunes with interesting fauna and flora
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When the water level of the Rhine is low, you can walk to these islands on dry feet.
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From October 2014, the tomato islands were redesigned for around two million euros. The construction work was part of a nature conservation project that was partly financed with funds from the EU funding program LIFE+. A ditch was created at Auer Köpfle through which Rhine water is channeled into the Illinger Altrhein. In addition, two channels were created along the right bank of the Rhine, for which the existing groynes were divided. The excavated material was used to raise the islands. The construction work created three islands that provide gravel breeding areas that are safe from predators such as foxes. https://de.wikipedia.org/wiki/Tomateninseln
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The Bremer Grund is a nature reserve and can only be accessed via a bridge. Many grey and silver egrets sneezed there. Ducks, swans, geese, great crested grebes, coots and many songbirds are at home here. I have also seen kingfishers here. In spring, the birds are mostly on their own, as the bridge from the Old Rhine is usually flooded. Please stay on the paths, the animals will thank you. (Deer, hares, wild boars, foxes, etc.)
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The area extends west of Neuburgweier along the Rhine and has been designated as a nature reserve since November 18, 1986. The peace here is overwhelming. Take your time and look around! During floods you cannot cross the dam over the tributary of the Rhine. But then you have a spectacle of a different kind. The path further to the Rhine is roughly gravel and not easy to drive.
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The castle park is the central green area in Rastatt. Behind the castle, Margrave Ludwig Wilhelm of Baden-Baden planned a pleasure garden, as was known from France. Today the park combines baroque with modern elements. Fountains, flower gardens and colorful and shady arcades are still reminiscent of Rastatt's baroque period. The park is framed by chestnut trees, some of which are centuries old.
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Just 200 years ago there were numerous islands on the Rhine that kept changing when the water was high. With the regulation of the Rhine, however, these were largely lost and with them breeding areas for various waterfowl. As part of the LIFE+ project "Rheinauen bei Rastatt", three islands were created at the mouth of the Illinger Altrhein, on which waterfowl can stay, search for food and breed undisturbed. http://www2.lubw.baden-wuerttemberg.de/public/abt2/dokRepository/upload/10_12/919001000152/nreservat_auer_k_pfle_-_illinger_altrhein_-_motherner_w_rth_-_umgestaltung_kohlkopf_und_tomateninsel__infotafel_.pdf
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The region around Munchhausen is rich in natural beauty. Key natural monuments include the Delta de la Sauer National Nature Reserve, known for its exceptional biodiversity and wetland ecosystems. You can also explore the historic Le Site du Gros-Chêne, a recreational area built around the remnant of an ancient oak, and the significant German-French Border at the Alte Lauter, where a small river marks the national boundary.
Yes, several natural monuments are suitable for families. Rastatt Castle and Garden offers a great local recreation area with a palace garden, perfect for a relaxed outing. The Sandheiden und Dünen bei Sandweier und Iffezheim Nature Reserve is also considered family-friendly, offering unique sandy landscapes. Additionally, Le Site du Gros-Chêne features a picnic area and a playground, making it ideal for families.
The Delta de la Sauer National Nature Reserve is a haven for wildlife, particularly birds and amphibians. It hosts 183 bird species, with 77 nesting species including the bluethroat, penduline tit, great reed warbler, and the black kite. For amphibians, you can find abundant populations of European tree frogs and the rare western spadefoot toad, making it a significant site for biodiversity.
The region offers a variety of outdoor activities. You can enjoy running on trails like the "Rest stop at the Sauer Delta – Bridge over the Sauer loop" (Running Trails around Munchhausen). Cycling is popular with routes such as "Along the Rhine – Rhine Cycle Path loop" (Cycling around Munchhausen). Mountain biking is also an option, with trails like "Sauer Delta Nature Reserve – Münchhausen Memorial loop" (MTB Trails around Munchhausen). Many natural monuments, like Le Site du Gros-Chêne, serve as starting points for marked hiking and cycling trails.
Yes, Le Site du Gros-Chêne is designed with accessibility in mind. It offers a dedicated path suitable for people with reduced mobility and strollers, allowing everyone to enjoy the natural setting and recreational facilities.
This nature reserve is one of the most important sandy areas in Baden-Württemberg. It features unique geological formations, including one of the highest dunes in Baden, formed by shifting sands at the end of the Ice Age. The area is a habitat for rare and protected animal and plant species, with goats and sheep helping to maintain the delicate ecosystem by grazing.
The Sauer River is integral to the region's natural environment, especially within the Delta de la Sauer Nature Reserve. While direct navigation might be limited in some areas, the reserve offers circular routes for exploring the landscape, and the white willow forest within the delta allows for navigation by boat. The river's banks and estuary are excellent for birdwatching and enjoying the tranquil riparian scenery.
The German-French Border at the Alte Lauter marks a unique geographical and historical point. The small river, the Alte Lauter, serves as the state border between France and Germany. It represents the easternmost point of France and the southernmost point of Rhineland-Palatinate, allowing visitors to literally cross an international border without even noticing it.
Visitors frequently appreciate the diverse natural landscapes, from the rich biodiversity of the Delta de la Sauer to the unique sandy dunes. The blend of natural beauty with historical elements, such as the ancient oak at Le Site du Gros-Chêne and the historical significance of the German-French Border at the Alte Lauter, also adds to the appeal. Many enjoy the opportunities for hiking, cycling, and simply relaxing in nature.
While not a hidden gem in the traditional sense, the Tomato Islands are a fascinating and unique natural monument. These islands in the Rhine were created as part of a renaturation project, restoring breeding areas for waterfowl. Their name comes from a historical curiosity about tomatoes thriving on similar islands in the past, making them a spot with an interesting story and ecological importance.
The Bremengrund Nature Reserve is a protected area along the Rhine, known for its old forest stands and several river channels. It's a crucial retreat for numerous animals. Visitors can take a detour from the Rheindamm cycle path through the protected area to the Rhine, enjoying the natural beauty and diverse ecosystems, though it's important to stay on marked paths.


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