The Bronx Botanical Garden is a place my father and I have been going to since I was a child. Here's a photograph I took of him here. It has hundreds of species of trees and flowers. Sitting in the middle of the Bronx, it's most recognizable as a green oasis from the grays and concrete of city life.
Of all the many museums in New York, this one is the most striking to me because of the unique experience you have while viewing the art. This Frank Lloyd Wright building integrates art with architecture in a way that makes it unique to this city. No matter where you are standing you get an incredible, extremely thought out detail of his work and the exhibited work.
To have the best lunches like a 'fried peanut butter sandwich', lounge or book a room for a few days in the heart of the city, visit 'The Ace Hotel'. Ease down in the couches, order a Brooklyn Beer and relax. A great place to meet up.