The famous Gateway Arch that rises up in the city of St. Louis has become a symbol. This Arch represents all the triumphs the pioneers achieved while expanding the Western Frontier. As a result of the Gateway Arch, the city of St. Louis is now known as the “Gateway to the West”. However, the Gateway Arch isn’t the only interesting fact about Missouri. Did you know that in 1904 at the World’s Fair in St. Louis, the ice cream cone was invented.