Bjarke Ingels’ terrace-wrapped office tower The Spiral opens in Hudson Yards

It’s BIG’s biggest yet. Bjarke Ingels Group on Tuesday announced the completion of The Spiral, a 66-story office tower in Hudson Yards. The skyscraper at 66 Hudson Boulevard measures 2.8 million square feet and rises just over 1,031 feet tall, making it the architecture firm’s first completed supertall. In addition to its soaring height, The Spiral stands out for its series of cascading terraces that wrap around the building, “like a 1,000-foot-tall vine at the scale of the city’s skyline,” as the architect described.

Developed by Tishman Speyer and designed by BIG in collaboration with Adamson Associates, The Spiral takes up a full block on Hudson Boulevard between West 34th and West 35th Streets.

From street level, the tower’s glass facade provides passersby a glimpse of the building’s bright lobby, which features artwork by Dutch studio DRIFT and foliage. The lobby incorporates seven different metals as a nod to the neighborhood’s industrial heritage and includes floor panels designed to resemble the concrete planks of the adjacent High Line.

The design takes inspiration from the elevated park, extending the greenery of the public space to the skyline.

“The Spiral punctuates the northern end of the High Line, and the linear park appears to carry through into the tower, forming an ascending ribbon of lively green spaces, extending the High Line to the skyline,” Ingels, founder and creative director of BIG, said.

“The string of terraces wrapping around the building expands the daily life of the tenants to the outside air and light. As the trees and grasses, flowers and vines have taken root over the last two summers, The Spiral is slowly becoming an ascending ribbon of green wrapping around the entire silhouette of the tower – like a 1,000-foot-tall vine at the scale of the city’s skyline.”

Shrinking in volume as it rises, The Spiral combines the classic setbacks of Manhattan skyscrapers with the efficient and sustainable materials of modern towers. Indoor-outdoor workspaces are made possible through atriums that are connected to terraces on every floor.

The landscaped terraces and hanging gardens wind around the tower in a spiraling motion to create a “continuous green ribbon” around the facade of the building. The building offers roughly 13,000 square feet of outdoor space planted with resilient greenery. Each side of the building has different plants, depending on sun orientation and endurance against high-velocity winds.

According to the architects, a landscape of this size has never been installed at or above 300 feet elevation in New York City.

“The Spiral pioneers a new landscape typology by bringing gardens to a high rise. Its continuous cascade of greenery from one level to another provides office spaces with a new vertical dimension of social and biophilic connectivity,” Giulia Frittoli, partner at BIG, said in a press release.

“Designed to strengthen collaboration and well-being, each terrace hosts plantings specific to the varying daylight, winds and temperatures at every floor of the tower. These gardens will welcome neighboring birds, bees and butterflies to expand New York’s biodiversity to the city skyline”

On the very top floor of the building is ZO Clubhouse, a gathering place with an open-air terrace, a private lounge, grab-and-go food and beverage options, and event space, all with sweeping city views.

As 6sqft reported earlier this year, The Spiral will also be home to two new dining concepts by Gabriel Kreuther, who will operate a full-service restaurant and an all-day cafe serving breakfast and lunch. A new Peruvian-Japanese restaurant from the owners of Llama San and Llama Inn will open on the tower’s 10th Avenue side.

The Spiral is up to 75 percent leased. Tenants include Pfizer, New York-Presbyterian Hospital, HSBC, Baker Tilly, AllianceBernstein, ProShares, Marshall Wace, Turner Construction, and Debevoise & Plimpton.