The Frank Stella’s are the best. They are all over the city and they always look amazing. Two of my favorites are the Saatchi and Saatchi lobby (pictured) and the Citi Corp building in Midtown.
I probably frequent here twice a week, because I am obsessed with Mexican food, and I'm fortunate enough to live in close proximity to this place. Taqueria Tepango is definitely a sapphire in the rough since there are a lot of terrible/over-priced Mexican restaurants in NYC.
A great way to escape the city...Especially amazing in Spring when the cherry blossoms are out. I love the Japanese pond, the famous NYers walk with plates for Arthur Miller or Lee Krasner and of course the green house.
My second-favorite outdoor-place in Manhattan. The abandoned 1.6 km rail tracks running above Chelsea down to the Meatpacking district were turned into an above-ground park. Perfectly nice place for sitting in the sun, reading, relaxing, having lunch in some green spot in the city. Nice views at the Hudson River, New Jersey, the Statue of Liberty (little small from there but still visible) and the architecture around Chelsea.