Don't thank me, thank America! We don't really have anything that's culturally awesome. I blame that on being a melting pot. Sure there are cool things, but nothing that's truly amazing. You can't compare anything we have to Chichen Itza, the pyramids, or the Coliseum. We don't have really old historical architecture. You can find some 1900's stuff, but very few centuries old places that are noteworthy save for maybe some southeastern native american stuff. Our best monuments would be colonial.