Dongyudao Hot Spring is the highest mineral-bearing medical saltwater hot spring in Hainan Province. Its source of water comes from the geothermal layer of the 400-deep salt deposit in Jiuqujiang River. The whole hot spring covers an area of 78,000 square meters. It is the largest garden-style hot spring flower garden in Asia. It has more than 30 wave-making pools, drifting rivers, swimming pools, small fish hot springs and various vanilla springs.