ARCH, designed by Glenn Kaino for Pittsburgh's 250th anniversary, represents the Steel City's many bridges.
Pittsburgh transformer
ARCH, designed by Glenn Kaino for Pittsburgh's 250th anniversary, represents the Steel City's many bridges.
Where have the days gone? 
Cool!
Whoa!
It looks like there should be little cars for passengers as the whole thing whips and grinds around for the biggest thrill ride, ever.