Exclusive | Running up the Vessel four times is the hottest new workout class

For tourists from around the world, the Vessel in Hudson Yards is a main attraction.They pay $10 a visit to climb to the top of the 16-story structure —which features 2,500 steps across 154 zig-zagging flights of stairs — and take in views of the city from 80 different landings.

But for some local New Yorkers, the Vessel is just a huge piece of gym equipment.A just-launched Equinox workout class has fitness freaks paying $55 to run up and down the honeycomb-shaped structure four times in 45-minutes and complete a grueling upper body strength workout at the top.

It’s no walk in the park.“It was more challenging than I thought it would be,” said Edgar Irizarry, 32, who works in tech, lives on the Upper West Side and did the class Tuesday morning.

“You think you are full of energy but then when you start getting closer to the top your legs just start hurting and feel really heavy and you still have two flights to go.”The classes take place on Tuesday at 7 a.m.— for Equinox members only — and Thursday at 7 a.m.

and 8 a.m.for the general public.

Reservations must be made in advance.Andrew Slane, one of the instructors, said the class is even difficult for those already in good shape.

“It’s very humbling,” he told The Post.“Many of the people taking the class run marathons and they were like, ‘This is hard.’”Christopher Vo, Director of Group Fitness Programming for Equinox, said it’s uniquely challenging because of the climbing aspect, which strengthens the glutes and legs.

“A lot of times when we are in a group fitness environment we are able to do things front to back or side to side but rarely do we get to go vertical,” said Vo.“It’s also a great cardiovascular workout.”Equinox has been wanting to do a class at the Vessel since it reopened last October, following a three-year closure necessitated by a string of suicides.

Vo said it’s a truly unique fitness venue.“To be in it and have the structure swirl around yo...