The Tri-State Area is the name of the metropolitan area surrounding Danville. It was founded by John P. Tristate, who united the Bi-State Area with an adjacent area, founded by Otto H. Adjacent. Tri-State Area Unification Day is celebrated on July 15 ("Hip Hip Parade"). Roger Doofenshmirtz is the current mayor of Danville. His brother, Heinz Doofenshmirtz often plans to create chaos in this area, not just the city of Danville itself. For such purposes, he once built a scale model of the Tri-State Area.