Gateway Arch is 50 and still fabulous

The Gateway Arch just turned 50!

On the occasional of this milestone birthday, some fun facts about the iconic monument:

It’s the world’s largest manmade arch, 630 feet in all. It is called an “inverted catenary curve” and constructing it required a complex mathematical equation. Two architects namedSaarinen (father Eliel and son Eero) entered the design competition which resulted in the arch. While Eliel received a telegram tellinghim he’d won, the news was intended for his son. It cost $13...