1. The U.N. Headquarters Building
Occupying an area on the East River between 42nd and 48th Streets, the headquarters of the United Nations embodied the hopes for postwar peace when it opened in 1952, and represents the very first example of International Style architecture in Gotham. Though it comprises a complex of three individual buildings, it’s most iconic element is the 39-story tower that houses the offices of the U.N. Secretariat. A vertical slab sitting parallel to the water, it’s designed by the brilliant Brazilian architect Oscar Niemeyer. Set to one side of the site, the Secretariat Building appears to cantilever above the lower-rise structures (General Assembly and Conference Buildings) that take up the rest of the campus, making it one of the indelible landmarks on the NYC skyline.