Kankariya Lake, built by Sultan Qutb-ud-Din in 1451, is the biggest lake in Ahmedabad. Earlier, the lake was known as Qutub Hojj and Hauj-e-Kutub. This lake has an island garden in the centre, with a summer palace called Nagina Wadi.  The Kankariya Lake is a famous recreational centre that has a boat club, parks, a natural history museum, Bal Vatika and a zoo.