Vessel, the Heatherwick Studio-designed structure that will rise 150 feet over 30th Street in Hudson Yards' public square, was revealed today at a press conference on the West Side. The interior of the ambitious work features 154 interconnected flights of stairs as well as 80 landings where people can pause to make life-changing Instagrams. Vessel, which will be paid for by Hudson Yards developers the Related Company and reportedly cost between $150 million and $200 million, is part of Hudson Yards' Public Square and Gardens, five acres of gardens and public plazas that will connect Hudson Yards to the High...