65 ILCS 5/11-105-1

The corporate authorities of each municipality may accept or receive through gift, grant, legacy, dedication in plats of subdivision or otherwise, parks, playgrounds, areas enclosing flood plains, floodwater runoff channels and detention ponds or basins, and other public grounds and easements located within the corporate limits or in unincorporated territory not more than 1 1/2 miles from such limits; may hold and maintain such grounds and lands; and may supervise or regulate their use for any proper public purpose.