Six Flags is the world's largest regional theme park company, with 26 parks across the U.S., Mexico and Canada. Since its beginning in 1961, Six Flags has entertained millions of families with world-class coasters, themed rides, thrilling waterparks and unique attractions. Six Flags is planning to open a 79-acre park, Six Flags Qiddiya, about 40 minutes from the Saudi Arabian capital of Riyadh.