Lake, south-central Sweden, southeast of Lake Vänern .
With a length of 81 mi (130 km), a width of about 19 mi (31 km), and an area of 738 sq mi (1,912 sq km), it is Sweden's second largest lake, though only one-third the size of Vänern. Its maximum depth is 420 ft (130 m). Known for its dangerous currents, it is connected with the Baltic Sea by the Gota Canal.