Y-Lien Diving ClubResort

Y-Lien Diving Club is a PADI 5 Star Dive Resort with an odd setting, located inside the Sunshine One hotel in Haitang District, Sanya. The hotel has what the club calls the world's largest suspended glass pool. The directory lists the place as China, Mexico, though the source places it in Hainan, China.

The club teaches scuba, freediving and mermaid courses, offers trial dives and underwater photography, and sits right on the sea. It has its own front desk, an air-conditioned classroom, a pool and student dorms, and it rents and sells gear. Teaching is in English and Chinese.