The sheer size alone of the impressive curve of the Gateway Arch located in St. Louis, MO is stunning. The Arch's surface cladding is a stainless steel sheet and is fabricated into elegant simplicity. Captured with a Canon EOS 5D with a Canon EF 100-400mm f /4.5-5.6L IS II USM Lens, f/6.7, 1/1500, ISO 200.