Rosebay Spa is on the sixth floor of the Grand Hyatt Jeju in Jeju City, where it offers full-body, foot, and facial therapies. Treatments include the Rosebay signature massage, a 60-minute muscle recovery massage, and foot massage, and guests can also use a Korean-style jjimjil spa facility. Reservations are required, and the treatment rooms contain a bathroom and a changing area. Snacks are served after the treatment, and prices are on the high side.