Claim: Six Flags Over Georgia, operated by Six Flags, an American amusement park corporation, headquartered in Grand Prairie, Texas, opened to the public in June 16, 1967.
Evidence: Six Flags Six Flags Entertainment Corporation, more commonly known as Six Flags or as Six Flags Theme Parks, is an American amusement park corporation, headquartered in Grand Prairie, Texas. Grand Prairie, Texas, U.S. June 16, 1967