Waterfalls cascade down from tree-covered cliffs at Jiuzhaigou National Park, southwest China's Sichuan Province. /CFP

Emerald lakes sit nestled in the mountains of Jiuzhaigou National Park, southwest China's Sichuan Province. /CFP

Both a nature reserve and a national park, Jiuzhaigou contains countless waterfalls, colorful lakes, and green mountains, presenting picturesque scenery across the seasons in Sichuan Province. The area was listed as a UNESCO World Heritage Site in 1992.