Mayoral candidate and Brooklyn Borough President Eric Adams attended the ribbon-cutting ceremony alongside Lieutenant Governor Brian Benjamin.
It's being described as the world's most immersive observatory experience.
"It's an attraction that brings everyone together but you have your very own personal experience with it," SL Green CEO Marc Holiday said.
SUMMIT One Vanderbilt opens as New York City rebounds welcoming visitors back from across the globe, and the observatory promises thrilling ways to take in New York's most stunning views combined with an immersive art experience that can be enjoyed from morning to night.
The ascent to the top of the observatory features all-glass enclosed elevators, which travel up the outside of the skyscraper to unveil breathtaking views at 1,210 feet above New York City.
It's the highest vantage point of Midtown.
Fully transparent glass skyboxes suspend guests in midair above Madison Avenue.
There's also a cafe called Apres by Danny Meyer's Union Square Events.
SUMMIT One Vanderbilt is located at 45 East 42nd Street and the entrance to the experience is located on the Main Concourse of Grand Central Terminal.
MORE NEWS | Glam Lab: Help battle Breast Cancer with these beauty products!
Beauty brands and products giving back in honor of Breast Cancer Awareness Month
----------
* Get Eyewitness News Delivered
* More Manhattan news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube