Cordyceps, also known as Caterpillar Fungus and which can sell for up to 90$ per gram, are exposed at a market in Yushu, a county-level city of Yushu Tibetan Autonomous Prefecture in the southern part of Qinghai province on May 30, 2016. The city is 3700m above sea level. (Photo by Giulia Marchi/The Washington Post)
