Yalong Bay (Yalong Wan) lies about 20km east of Sanya on the southern tip of Hainan Island, and is widely considered the finest beach on the island. The bay curves for around 7km in a broad arc, with white sand that stays fine-grained underfoot and water that stays clear well into the shallow. The area is a protected marine park, which has kept the beach from the worst of the overdevelopment that affects Sanya's other resort zones.
The headlands at either end shelter the bay from wind, which makes it calm for much of the year. A seashell museum near the beach has a large collection of tropical specimens, and there is a landscaped butterfly park nearby if you want a break from the sun. Most visitors stay at one of the large international resort hotels that back the beach.