Vänern is the largest lake in Sweden, the largest lake in the European Union and the third-largest lake in Europe after Ladoga and Onega in Russia. It is located in the provinces of Västergötland, Dalsland, and Värmland in the southwest of the country. With its surface located at 44 metres above sea level and a maximum depth of 106 metres, the low…Vänern is the largest lake in Sweden, the largest lake in the European Union and the third-largest lake in Europe after Ladoga and Onega in Russia. It is located in the provinces of Västergötland, Dalsland, and Värmland in the southwest of the country. With its surface located at 44 metres above sea level and a maximum depth of 106 metres, the lowest point of the Vänern basin is 62 metres below sea level. The average depth is a more modest 28 metres, which means that the lake floor is above sea level on average.