Hainan is home to a large population of ethnic minorities, predominantly the Li and Miao Ethnic Groups, and you can find out more about them at this park, about 30km outside of Sanya. The park is very commercial with a large number of shops, snacks for sale and (paid) opportunities for photographs with locals in traditional costumes or with indigenous animals. Despite this, it appears that there has been a genuine attempt to show the traditional life and customs of the two minorities, and the park appears less tacky than some other similar attractions elsewhere in China. It is probably also a relatively good way for money to be returned to the local community. There is a steep entrance fee but the park is huge and there are a wide variety of shows; it will take you 3-4 hours to see in its entirety. Be prepared though to fight your way through Chinese tour groups shouting "Blong" as often as they can, the Miao word for hello, and try to eat before you leave as the restaurants outside the park are overpriced.
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呀诺达雨林文化旅游区
Yanoda, meaning 123 in Hainanese, is a newly developed rainforest park, well organised and nicely landscaped. An inner bus takes groups to the start point which also has a great view of Chitian reservoir. Wooden paths then take you on a 40 minute hike up a forest valley, past 1000 year old trees that have grown around rocks, with optional light abseiling and rope river crossing. At the top, you enter a landscaped lakeside park with lotuses, colourful flowers and a canteen offering a nourishing herbal buffet (mostly for tour groups). The path continues up into the hills, past labelled jungle trees with huge palms overhead. This park is fairly good value, and in keeping with its subject matter, reasonably natural. At least you know the developers couldn't have maneuvered the hefty trees into place, even for the reputed price of ¥3 billion that the park cost to civilize.
七仙岭温泉国家森林公园
This park is known for its tropical rainforest, beautiful mountain peaks, and natural hot springs. Visitors can enjoy hiking, explore nature, and relax in the hot springs.