New York is so stuffed with amazing/noteworthy things that you can run into them without even looking for them. Why, there's the Chrysler Building!
And that gallery at MoMA that we almost skipped? It has Les Demoiselles d'Avignon!
And you know how you'd seen the Empire State Building from a distance but hadn't had a closer view? It was behind you outside Penn Station and Madison Square Garden the whole time! (Seriously, the last day I was there I realized this iconic New York building had been the direction I hadn't looked pretty much every day.)