Wellington Park, Grove St, Arlington, MA 02476, US

In 2006, a $7.7 million renovation of Dilboy Stadium transformed this once forlorn state-owned facility into a recreational showpiece. Football, soccer and track teams now compete in the gleaming 3,000-seat stadium on an immaculate turf field and an eight-lane international-standard track. Meanwhile outside, you'll find the state-run DCR swimming pool, two baseball fields also used for soccer and football, two tennis courts, basketball courts, a playground and two free parking lots. All this comes wrapped up in Alewife Brook Reservation which runs alongside the area. Good to know: Pool admission, as at all Department of Conservation and Recreation pools, is free.