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Phu Sang National Park
Phu Sang National Park is a protected forest area straddling Phu Sang District in Phayao Province and Thoeng District in Chiang Rai Province, along the Thailand-Laos border. Established in 2000 as Thailand's 98th national park, it covers about 284 square kilometers of mountainous mixed deciduous and evergreen forest. It is best known for Phu Sang Waterfall, a rare warm waterfall fed by a geothermal spring, along with viewpoints, caves and nature trails.