The Mission Hills golf resort on Hainan Island, China, has opened one of the world’s largest spa facilities.

Designed by San Francisco-based firm SB Architects, which was also responsible for the resort’s clubhouse, along with Florida landscape design practice EDSA, the 21-acre Mission Hills Volcanic Mineral Springs and Spa is home to the largest natural springs reserve in the region. The spa is surrounded by gardens, over 150 springs and water features, and treatment venues. Twenty-nine spa villas are also part of the complex.

“We are proud to introduce this project to a global audience,” said Scott Lee, president of SB Architects. “We believe we have created a destination that sets the standard by which design, service and the spa experience are measured on Hainan Island and throughout China.”

Featuring 61 spa treatment suites, the spa’s main structure is comprised of semi-circular bamboo rising from a lava stone base.