Heritage Park 5400 149th St, Oak Forest, IL60452 Heritage Park's softball diamond and playground might be overshadowed by the park's unique feature—an antique…More cannon on display. Also known as "Cannon Park," the 2.75-acre park is located at 149th Street and Long Avenue. Visitors can hop on swings, shoot down slides and climb their way to the top of the playground, all while parents look on from benches surrounding the play area. The play area is slightly elevated and enclosed by railroad ties. Mulch softens the play area for any clumsy visitors.