Oh man! the architecture of that city! Even the newer buildings tended to be nice to look at. But the older stuff is as amazing as any city I've ever been to.

And you wanna talk about nice? Pittsburgh people were so damn welcoming. No city is perfect, but I've never been to any city where I had zero unpleasant encounters. Could have been luck (and probably was, at least in part), but it left a great impression on me.