Starzlachklamm, Natural monument in Sonthofen, Germany
Starzlachklamm is a slot canyon near Sonthofen in the Allgäu region of southern Germany, cut through limestone by the Starzlach River and stretching about 400 m in length and 30 m in width. The canyon walls rise steeply on both sides, and the path leads past waterfalls, deep pools, and smooth rock faces shaped over a long time by the river.
The gorge was formed as the Starzlach River slowly eroded its way through the limestone bedrock over thousands of years. It is now listed as a natural monument and a geotope, recognizing its value as a record of how water shapes rock over long periods.
The name Starzlachklamm comes from the Starzlach River, which carves its way through the rock and fills several natural basins along the route. Visitors walk very close to the water for much of the path, stepping over wet rocks and crossing small bridges above the current.
Sturdy footwear with good grip is strongly recommended, as much of the path runs over wet and slippery rock. It is worth checking the weather before visiting, since heavy rain can raise the water level inside the gorge very quickly.
At the far end of the gorge there is a natural rock slide, polished smooth by the river, that visitors can use to glide out of the canyon when the water level allows it. The slide is not a man-made feature but the direct result of water wearing the stone down over a very long time.
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