Lake Garda is the largest lake in Italy. It is a popular holiday location located in northern Italy, about halfway between Brescia and Verona, and between Venice and Milan on the edge of the Dolomites. Glaciers formed this alpine region at the end of the last Ice Age. The lake and its shoreline are divided between the provinces of Verona (to the south-east), Brescia (south-west), and Trentino (north). The name Garda, which the lake has been seen referred to in documents dating to the eighth century, comes from the town of the same name. It is the evolution of the Germanic word warda, meaning "place of guard" or "place of observation."

The northern part of the lake is narrower, surrounded by mountains, the majority of which belong to the Gruppo del Baldo. The shape is typical of a moraine valley, probably having been formed under the action of a Paleolithic glacier. Although traces of the glacier's actions are evident today, in more recent years it has been hypothesised that the glacier occupied a previously existing depression, created by stream erosion 5 to 6 million years ago.

More Info: en.wikipedia.org