Six Flags New England, formerly known as Gallup's Grove (1870–1886), Riverside Grove (1887–1911), Riverside Park (1912–1995) and Riverside: The Great Escape (1996–2000), is an amusement park located in Agawam, Massachusetts. Opening in the late 19th century, it is the oldest amusement park in the Six Flags chain, acquired by Premier Parks in 1996 and rebranded Six Flags New England in 2000. Superman The Ride is among the park's most notable rides, having appeared as a highly ranked roller coaster in the annual Golden Ticket Awards from Amusement Today since the ride opened in 2000.

Six Flags Entertainment Corporation, formerly Six Flags Theme Parks, Inc., is an American amusement park corporation, headquartered in Arlington, Texas. It has properties in Canada, Mexico, and the United States. Six Flags owns the most theme parks and waterparks combined of any amusement-park company and has the seventh highest attendance in the world. The company operates 27 properties throughout North America, including theme parks, amusement parks, water parks, and a family entertainment center. In 2019, Six Flags properties hosted 32.8 million guests.