Isteiner Schwellen, Rapids at Efringen-Kirchen, Germany.
Isteiner Schwellen are rapids along the Upper Rhine that extend for approximately one kilometer, formed by rock formations that create distinctive water patterns. The natural obstacles in the river result from varying depths and slope changes in the riverbed.
These rapids represent the last remaining fragments of a Jura ridge that once obstructed the Rhine's flow northward. River engineering works in the 1800s significantly transformed the landscape through regulation and modification.
The riverside becomes a popular meeting place during summer months, drawing swimmers and sunbathers from nearby regions. Visitors from the tri-border area gather here to enjoy the water and relaxation.
Multiple hiking trails lead to the location, with a dedicated parking area providing convenient access to the site. An observation platform allows visitors to view the rapids comfortably from above.
The water level at these rapids dropped approximately 11 meters following construction of the Grand Canal d'Alsace, revealing rock formations that had been underwater. This dramatic shift exposed geological features previously hidden beneath the surface.
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