Lake Como, also known as Lario, is a lake of glacial origin in Lombardy, Italy. It has an area of 146 square kilometres, making it the third-largest lake in Italy, after Lake Garda and Lake Maggiore. At over 400 metres deep, it is the fifth-deepest lake in Europe and the deepest outside Norway; the bottom of the lake is 227 metres below sea level. One n…Lake Como, also known as Lario, is a lake of glacial origin in Lombardy, Italy. It has an area of 146 square kilometres, making it the third-largest lake in Italy, after Lake Garda and Lake Maggiore. At over 400 metres deep, it is the fifth-deepest lake in Europe and the deepest outside Norway; the bottom of the lake is 227 metres below sea level. One notable characteristic is its distinctive "Y" shape.