Best natural monuments around Lüterswil-Gächliwil are found within the scenic Bucheggberg region, characterized by forested ridges, gentle hills, fields, and meadows. This area offers a natural landscape popular for hiking and exploration. The region features a mix of geological formations, historical sites, and diverse ecosystems. Visitors can find various natural attractions, including significant nature reserves and unique wildlife habitats.
Last updated: September 29, 2026
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very beautiful and all along the Aare
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Storks have settled and built nests on a number of houses in Altreu. Stork chicks can also be observed here in mid- to late June.
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The Old Aare – a fascinating river landscape between Aarberg and Büren. It is a valuable habitat for numerous animals and plants. People from near and far love and appreciate it as an attractive relaxation area. This unique idyll was created as a result of the first Jura water correction in the 19th century. The Alte Aare Hydraulic Engineering Association, together with private and public partners, ensures that this landscape is preserved. Source https://www.alte-aare.ch/
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If you are there in the right season, you will see the storks.
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We hiked from the swimming pool in Büren a.A. over the footbridge on the "inside" of the loop. You can hardly see anything from the Aare. That's why we stopped halfway. Then try the part from Meienried or around the outside again. But we were welcomed in Büren an der Aare with a "holiday feeling" and enough time to stop!
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Lookout tower on the banks of the Aare in Selzach. There is free parking at the swimming pool in Solothurn, from there the hike begins, initially on an asphalt road, and after approx. 2 km, directly following the course of the Aare. From now on you hike on an agricultural path and then on a natural path further west. The wooden tower, which is freely accessible, is located at the level of the municipality of Selzach. A spiral staircase leads to the viewing platform, from where a good overview of the Aare nature reserve and the Jura in the north, with the municipality of Selzach, is possible. After this detour, the path continues to the hamlet of Altreu. Directly on the Aare is the restaurant "zum Grüne Aff" which has a beautiful garden restaurant that invites you to stop by. If you don't want to make the way back on foot, you can also take the Bielersee Schifffahrtsgesellschaft (BSG) ship to Solothurn from the restaurant. The landing stage in Solothurn is located at the Krummen Turm, which is one of the landmarks of Solothurn.
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The Witi protection zone is a cantonal agricultural and conservation zone north of the Aare river between Grenchen and Solothurn in the Swiss canton of Solothurn. "Witi" is the Solothurn dialect and means "wideness". The zone was established by law in 1994. It is located in an area of scenic beauty, is a migratory bird and waterfowl reserve of international importance and is home to Switzerland's hare chamber, an above-average population of hares. The largest area of this is the Grenchenwiti. The protection zone may only be used extensively for agricultural purposes. There are also conflicts of use in the area of recreational activities, which are being attempted to be resolved through regulation in the sense of a compromise (concentration of recreational use). In certain areas, the protection of nature takes priority, and attempts are being made to consistently enforce this. The Witi landscape is originally a product of the last ice age, when the entire area was covered in ice by the Rhone glacier. When the lake receded due to warming, Lake Solothurn was formed around 12,000 years ago, the level of which was around 20 metres above today's Witi. When Lake Solothurn retreated, the Witi remained as the lake bed alongside the Aare. Until the Jura water correction, the area was a frequently flooded floodplain and swamp landscape where agriculture was only possible under difficult conditions. Between 1980 and 1995, 97 breeding bird species were observed in the Witi, 37 of which were on the Swiss Red List of endangered species, as well as 150 migratory and winter guest species. Due to the frequent pools of water in the cultivated land, the Witi developed into the third most important wader resting place in Switzerland. It is noteworthy that the majestic osprey is also observed relatively frequently, preferably in spring, as a migrant; some of the birds even spend the night in trees along the banks of the Aare. The black stork is also an irregular migrant, although the animals occasionally and temporarily stay in the white stork enclosure of the Altreu stork settlement. The nightingale, which is notable for its beautiful song, is also a frequent breeding bird in the Altreuer Witi. Source: Wikipedia
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At this point you have the best perspective of the beautiful Bellacher Weiher. So it's worth a short stop here. Here you have direct access to the water. With a bit of luck, you will see toads and blindworms here - in addition to water birds. Very rarely an adder. In autumn you can see strange water birds that stop here on their way to the south.
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Visitors frequently enjoy the Bellacher Weiher, a cantonal nature reserve that was originally a fish pond for Solothurn. Another popular spot is the Stork colony in Altreu, where you can observe storks in their natural environment and learn about their reintroduction in Switzerland. The Alte Aare Nature Reserve is also highly appreciated for its fascinating river landscape and diverse wildlife.
Yes, the Alte Aare Nature Reserve itself has historical roots, as its unique landscape was created as a result of the first Jura water correction in the 19th century. Additionally, the Sandsteingrube Ober Bockstein, while not listed as a highlight in the provided data, is a notable geological feature with a rich history, having been used for quarrying millstones and stove plates since the 16th century. It offers a glimpse into local industrial heritage intertwined with nature.
The Stork colony in Altreu is, as its name suggests, an excellent place to observe storks. The Bellacher Weiher is home to water birds, and with a bit of luck, you might spot toads, blindworms, or even a rare adder. The Alte Aare Nature Reserve is a valuable habitat for numerous animals and plants, making it a great spot for general wildlife observation.
Many of the natural monuments are suitable for families. The Stork colony in Altreu features an information center and a playground, making it engaging for children. The Bellacher Weiher and Alte Aare Nature Reserve offer gentle paths and opportunities for nature observation that are enjoyable for all ages. The Observation Tower at the Aare Nature Reserve also provides an accessible way for families to enjoy panoramic views.
The Bucheggberg area, encompassing Lüterswil-Gächliwil, is known for its excellent hiking trails through forested ridges, gentle hills, fields, and meadows. You can find various routes, including the easy Waldhaus Biezwil loop from Lüterswil-Gächliwil (6.4 km) or the View from Egg near Aetigkofen loop (5.6 km). For a moderate challenge, consider the Mühlebach Stream – Buchegg Castle loop from Buchegg (16.3 km).
Yes, the region offers diverse outdoor activities. You can explore gravel biking routes, such as the moderate Along the Canal – Lake Biel loop from Dotzigen (43.6 km). For road cycling enthusiasts, there are options like the easy Three Confederates Inn loop from Lüterswil-Gächliwil (22.3 km) or more challenging routes like the Grenchenberg – The Aare River near Grenchen loop.
The Bucheggberg area is particularly recommended in autumn when the sun can break through the Aare valley's fog, offering beautiful views of the Jura chain. However, the natural landscapes, including lakes, river landscapes, and wildlife habitats, are enjoyable throughout the warmer months for hiking and outdoor exploration.
Yes, you can visit the Observation Tower at the Aare Nature Reserve, located on the banks of the Aare in Selzach. It offers a good overview of the Aare nature reserve and the Jura mountains. Another option is the Häftli Observation Tower in the Häftli nature reserve, which is excellent for bird watching over the old Aare.
Visitors particularly appreciate the peaceful and quiet landscapes, the diverse ecosystems, and the opportunities for nature observation. The combination of geological features, historical sites, and rich wildlife, such as the storks at Altreu or the varied life around the Bellacher Weiher, makes for a rewarding experience. Many also enjoy the well-maintained trails and the scenic views, especially from the observation towers.
While specific public transport details for each monument are not provided, the region is generally accessible. For example, to reach the Observation Tower at the Aare Nature Reserve, you can start a hike from Solothurn, which is well-connected by public transport. After visiting, you can even take a ship back to Solothurn from Altreu, offering a scenic return journey.
Beyond the general landscape of forested ridges and gentle hills, the Sandsteingrube Ober Bockstein stands out as a unique geological feature. It's an old sandstone pit with a tunnel, offering a fascinating look at the local geology and its historical use for quarrying, even featuring a fireplace and seating for visitors.


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