The larger ones are of glacial origin and are located near the country's borders. The largest is Lake Constance, with an area of 539 square kilometers, which is also partly located in Switzerland and Germany. The second largest lake is Lake Neusiedl, with an area of 152 square kilometers, located in Austria and Hungary.
There are two lake districts in the interior of the country, one in the Salzkammergut region, where the largest lake is Atter, with an area of 46 square kilometers. The second lake district is located in Carinthia, where the largest lake is Wörther with an area of 19 square kilometers. These lake districts constitute an important tourist region of the country.
There are numerous glaciers in the mountains, up to 10 km long.
