Fanshawe Lake, is a small man-made lake east of London, Ontario. It is fed by the Thames River from the north, and is separated from the river to the southwest by Fanshawe Dam. The Lake is a popular choice for boaters during the summer months, and also features many low flying aircraft, as the lake is used to line up approaches for aircraft landing in the airport to the south. The reservoir was closed to swimming in 2009 due to the presence of blue/green algae.