When viewers tune in to “The Tonight Show” these days, besides Jimmy Fallon’s huge smile and the Afro of his bandleader, Questlove, they are met by a remarkably realistic Manhattan skyline.

There is the cityscape on a curtain, of course — a staple of late-night television since Johnny Carson was on the air — but also 37 wooden models behind Mr. Fallon’s desk. And not just of familiar landmarks like the Empire State Building and the Statue of Liberty, but less obvious ones, too, including the Hearst Tower, the Pier 17 mall and the Maritime Hotel.

Yet one building is missing that is impossible to miss, and not only from Mr. Fallon’s offices at Rockefeller Center but just about everywhere in New York City: 432 Park Avenue.

On Friday, the 104-unit condominium tower, between 56th and 57th Streets, reached its peak of 1,396 feet. At 96 stories, it is arguably the tallest building in the city. One World Trade Center has its spire, but the skyscraper itself is 28 feet shorter than 432 Park. As for the Empire State Building, this new 93-foot-by-93-foot concrete megalith bests it by nearly 150 feet. From the living room of 432 Park’s penthouses, it is possible to look down on the observation deck there, flash bulbs glittering like an oversize chandelier.