By the numbers: New York's 111 West 57th Street building - SilverKris
"A strikingly slender residential skyscraper noted for its impressive exterior and extraordinary height of 435 m; combined with the narrow plot width, it is described as the world’s thinnest skyscraper. The tower houses 46 condominiums (including seven duplex units) with lofty 4.3 m ceiling heights and offers resident amenities such as a 25 m-long pool, a gym, a barbershop and a shoeshine stand." - Delle Chan