Why the Empire State Building hasn't lost its popularity The New York City building turns 90 on May 1 and has had a history unlike any other. DW looks at its legacy. The world's most popular skyscraper? A visit to this skyscraper is an absolute must on any sightseeing trip to New York City. In pre-pandemic times, it was visited by 4 million people a year. Visitors simply didn't want to miss the chance to check out the view of the "Big Apple" from its observation deck on the 86th floor. On May 1, 2021 the Empire State Building celebrates 90 years since it opened to the public.