Six Flags Great Adventure is an amusement park owned and operated by Six Flags, located approximately 20 miles southeast of Trenton in Jackson, New Jersey. Situated between New York City and Philadelphia, the park complex also includes Hurricane Harbor water park. The park opened as Great Adventure in 1974 under the direction of restaurateur Warner LeRoy and was acquired by Six Flags in 1977. In 2012, Six Flags combined its 160-acre (65 ha) Great Adventure with its 350-acre (140 ha) Wild Safari animal park to form Six Flags Great Adventure & Safari park. At 510 acres (210 ha), it is the second-largest theme park in the world following Disney's Animal Kingdom.