Lake Como, also known as Lario, is a lake of glacial origin in Lombardy, Italy. It has an area of 146 km2 (56 sq mi), making it the third-largest lake in Italy, after Lake Garda and Lake Maggiore. At over 400 metres (1,300 ft) deep, it is one of the deepest lakes in Europe. Its characteristic "Y" shape resulted from the movement of the ancient Adda glacier, which was diverted by the mountainous terrain and carved the three branches.