Vessel is in the outdoor public space of Hudson Yards, which is still under construction. Here's what the NYC neighborhood looked like in October 2017.
The 600-ton structure features 154 flights of stairs and 80 landings, which connect to form a lattice of walkways. Thomas Heatherwick, founder of London's Heatherwick Studio, designed it.
Visitors will be able to climb 2,500 steps, totaling a mile of pathway above the plazas and gardens below.
Only physically impaired visitors will be able to use Vessel's glass elevator to reach the top.
Construction workers attached Vessel's last piece on Wednesday morning. The sculpture widens from 50 feet across at its base to 150 feet at its top.
Construction began in April 2017. The 103 pieces arrived by ship from Monfalcone, Italy, where they were made in a factory.