six flags entertainment corporation is the world’s largest regional theme park company headquartered in grand prairie, texas with 18 parks across the united states, mexico and canada. since 1961, hundreds of millions of families have trusted six flags to offer affordable, value-packed thrills, record-shattering roller coasters and special events like the summer concert series, fright fest and holiday in the park. six flags’ wide array of entertainment options attract families, teens, tweens and thrill seekers alike.