thumb|right|250px|Map of Belle Isle, Windermere
Belle Isle is the largest of 18 islands on Windermere, a mere in the English Lake District, and the only one ever to have been inhabited. In 1250 it was the seat of the district's Lord of the Manor. The house was sold along with the island to the wealthy Curwen family who renamed the island after their daughter, Isabella. The descendants of Isabella and her husband John Christian Curwen lived on the island until 1993.