New York's $25 billion Hudson Yards development is open to the public.

People lined up Friday to climb the 2,500 steps to the top of a massive sculpture named Vessel.

More Images
People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

New York's $25 billion Hudson Yards development is open to the public.

This March 5, 2019 photo shows "Vessel," a 150-foot-tall structure of climbable interlocking staircases, that is the center point of the $25 billion Hudson Yards Redevelopment in New York. The climbable structure designed by Thomas Heatherwick opens to the public on Friday, March 15, 2019. (AP PhotoMark Lennihan)

CNN's Anderson Cooper hosted the inaugural ceremony, which included Democratic Sen. Chuck Schumer and other New York elected officials.

People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

Half of the 28-acre mini-city by the Hudson River is completed. The rest will be done by 2025.

The Vessel, a 16-story spiral staircase, is illuminated at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

The Vessel, a 16-story spiral staircase, is illuminated at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of a Piaget store during the opening night of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of a Piaget store during the opening night of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

It's the visual centerpiece of a complex of high-rises on Manhattan's West Side with luxury commercial and residential space, including about 100 shops and restaurants.

People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

CNN's Anderson Cooper hosted the inaugural ceremony, which included Democratic Sen. Chuck Schumer and other New York elected officials.

CNN will be a tenant at Hudson Yards along with its parent company, WarnerMedia.

Also at the opening was developer Stephen Ross, whose company, Related, partnered with Oxford Properties Group to build Hudson Yards.

This March 5, 2019 photo shows "Vessel," a 150-foot-tall structure of climbable interlocking staircases, that is the center point of the $25 billion Hudson Yards Redevelopment in New York. The climbable structure designed by Thomas Heatherwick opens to the public on Friday, March 15, 2019. (AP PhotoMark Lennihan)

This March 5, 2019 photo shows "Vessel," a 150-foot-tall structure of climbable interlocking staircases, that is the center point of the $25 billion Hudson Yards Redevelopment in New York. The climbable structure designed by Thomas Heatherwick opens to the public on Friday, March 15, 2019. (AP PhotoMark Lennihan)

Half of the 28-acre mini-city by the Hudson River is completed. The rest will be done by 2025.

People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

The Vessel, a 16-story spiral staircase, is illuminated at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

The Vessel, a 16-story spiral staircase, is illuminated at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of a Piaget store during the opening night of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)

People attend the opening of a Piaget store during the opening night of The Shops & Restaurants at Hudson Yards, Thursday, March 14, 2019, in New York. Hudson Yards, a $25 billion urban complex on Manhattan's west side, is the city's most ambitious development since the rebuilding of the World Trade Center. When fully complete, the 28-acre site will include 16 towers of homes and offices, a hotel, a school, the highest outdoor observation deck in the Western Hemisphere, a performing arts center and the shopping mall. (AP PhotoMark Lennihan)