La Piscine, Hôtel Americano
Officially the coolest spot to stand fully clothed and literally look down on all the peasants without rooftop pool access. Although this pool often acts as more of a conversation piece than a functional swimming spot, its presence is still guaranteed to make you cooler (both literally and figuratively).
Hôtel Americano, 518 West 27th Street
[Photo via @reyvakili]