The United Nations and surrounding area is full of Poke stops. Check out the six UN-related Pokestops outside of the UN. You can get your fill of Pokeballs, potions, and the very mysterious 2km, 5km, and 10km eggs! Not to mention the many lures that tourists and other trainers attach to these stops!
If you are able to get into the UN for a tour, you can also reach the more exclusive Pokestops inside the UN!
After you go to all the Pokestops, make sure to check out the area for Pokemon! There are a bunch of Pokemon that roam First Avenue. Trainers have seen Squirtles, Muks, Onyxes, and even Hitmonchans!
Common Pokemon in the area are Zubats, Clefairys, and of course Pidgeys.
What are you waiting for? Go out and tour the United Nations while you go become the very best with Best Delegate!