Six Flags Great America is a 304-acre (123 ha) amusement park located in Gurnee, Illinois, within the northern Chicago metropolitan area. The amusement park originally opened as Marriott's Great America on May 29, 1976, as one of two theme parks built by the Marriott Corporation. Six Flags acquired the amusement park in 1984 after the theme park division was an earnings disappointment for Marriott. The sale gave Six Flags rights to the Looney Tunes intellectual properties.