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 American-themed theme parks built by the Marriott Corporation. Six Flags has owned and operated the park since 1984.
Featuring 15 roller coasters, the park ranks fourth-most roller coasters in the world, tied with Cedar Point. Additionally, the park features twelve themed areas as well as an adjacent 20-acre (81,000 m2) water park called Hurricane Harbor Chicago. Over 3 million guests visited Six Flags Great America since 2017, ranking it among the top 20 amusement parks in North America for attendance.