Facts About Lake Constance:
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Lake Constance is the third-largest freshwater lake in Central and Western Europe in surface area and the second-largest in volume.
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Lake Constance was formed by the Rhine Glacier during the ice age and is a zungenbecken lake.
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The Roman geographer Pomponius Mela was the first to mention the lakes around 43 AD, calling the upper lake Lacus Venetus and the lower lake Lacus Acronius.
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In Lake Constance, there are ten islands that are larger than 2,000 m². The largest is the island of Reichenau in the Untersee.
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The lake lies where the countries of Austria, Germany, and Switzerland meet. There is no legally binding agreement as to where the borders lie between the three countries.
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In late August 2005, heavy rain raised the level by more than 70 cm in a few days. The rains caused widespread flooding and washed out highways and railroads.
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Around 45 species of fish live in Lake Constance.
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Lake Constance refers to three bodies of water on the Rhine at the northern foot of the Alps: the Obersee or Upper Lake Constance, the Untersee or Lower Lake Constance, and a connecting stretch of the Rhine called the Seerhein.
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The max length of Lake Constance is 39 miles, and the max width is 8.7 miles, with an average depth of 300 ft and max depth of 823 ft.
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In 1963, the whole lake froze. This has not happened since then.