Sanya is located in the south of the little known island of Hainan, a large tropical island off the southern coast of China. The city itself, although attractive, serves mainly as a starting point for those travelling on to the beaches.
From the Sanya Travel Guide
Absolutely loved it here! Fantastic value for money, it felt like a boutique backpackers. The cleanest place I have stayed in China so far. It's a fishing village, so if street food and local culture isn't your thing, stay at a resort. They did have good food, excellent French wine and tasty Vietnamese coffee at the hostel though. ... more