Downsview Park in Toronto is a massive urban park around an artificial lake Stay in the loop Sign up for our free email newsletter. Unsubscribe anytime or contact us for details. Downsview Park is a massive urban playground in the middle of the city that comes with plenty of walking trails around an artificial lake and hilly terrain offering expansive views. Downsview Park spans over 570 acres. The 572 acres smack-dab in Toronto's Downsview neighbourhood used to be a Canadian Forces base before it was declared Canada's first urban national park in 1999. Fresh City Farms operates the urban farm found in the park.