Mill Creek Park 1350 Radcliffe Rd, Buffalo Grove, IL60089 Mill Creek is a large open-air park located close to Buffalo Grove High School. The site has basketball courts, a…More playground and a large baseball field. Located right next to a church, the area is convenient for parents looking for a place to take their kids. The playground is rather large and has swings, a jungle gym and slides. Little league baseball games are often held here in the spring/summer.