PALISADES PARK, N.J. — Sitting naked in a two-feet-deep, ice-cold pool, Ángel Meléndez, 24, a track coach, stretched his left leg so that his thigh was flush against his abs. Across the room, William Leung, 23, a banker, sat in a steaming and overflowing hot tub. Elsewhere in the building, Olivia Wright, 22, a teacher, was taking a nap in a cheongito, a fragrant sauna made of clay.

The three friends from Boston had made a four-hour drive to King Spa & Fitness, a 40,000-square-foot oasis of serenity and relaxation here that has become a popular destination for those seeking Korean-style pampering.

Many visitors, like the three who had come from Massachusetts, stay overnight at the spa, which is open year-round, 24 hours a day. “It’s something different,” Mr. Meléndez said of his visit. “Who doesn’t want something different for once?”