For my third post, I want to show this special architecture- Gateway Arch. The Gateway Arch is in St. Louis in the U.S. state of Missouri. And Google said it a 630-foot monument, it is unbelievable. American government built this architecture in memory the spirit west development. We all need to salute those pioneers. At the last picture, we can see this architecture is build from two part, and it is a gigantic project. The arch is made of stainless steel, which has exact curvature. I cannot image how hard to finish this special architecture. Thanks the designer and constructors let me can see those amazing architecture.