The Four Seasons Philadelphia at Comcast Center is set to open 12 August with a 17,321sq ft spa that encompasses the entire 57th floor.

Under the guidance of spa director Verena Lasvigne-Fox, the spa features a subtle crystal theme, with more than 700 pounds of crystals embedded into the walls. Lasvigne-Fox is also working with Rashia Bell from The Cristalline as a crystal healer, and the crystal theme is woven into the spa’s signature treatments.

Treatments feature products from May Lindstrom Skin, Dr Burgener Switzerland, Dr Barbara Sturm's Skin Care Line for Darker Skin Tones, and Vitaman.

The spa also features a lifestyle boutique, a 30,000-gallon outdoor infinity-edge pool and a state-of-the-art fitness centre created in consultation with celebrity fitness guru Harley Pasternak.

Located atop the 1,121ft (342m) Comcast Technology Center in Philadelphia’s downtown, the 219-bedroom Four Seasons Hotel Philadelphia at Comcast Center has been designed by Norman Foster of Foster + Partners, and offers views from the 48th to 60th floors at the building’s summit.

“The history and culture of Philadelphia are so often expressed in the characteristic storytelling of its art and architecture. Now, thanks to the vision of our partners at Comcast and a world-class team of designers, architects and artists, the Comcast Technology Center stands tall as a new Philadelphia landmark – reshaping the city’s skyline and signifying a new, exciting chapter in its storied history,” said Christian Clerc, president, worldwide hotel operations, Four Seasons Hotels and Resorts.