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Windermere is the largest natural lake in England. It is a ribbon lake formed in a glacial trough after the retreat of ice at the end of the last ice age some 13000 years ago.

The lake is largely surrounded by foothills of the Lake District which provide pleasant low-level walks; to the north and north-east are the higher fells of central Lakeland. It has been one of the country's most popular places for holidays and summer homes since the arrival of the Kendal and Windermere Railway's branch line in 1847.