The Piyang Grottoes (皮央石窟群, Piyang shiku qun , English Piyang Grottoes) are located 40 km north of Zanda (札达县, Zhada), Ngari (Ali), Tibet, China. They represent a Buddhist cave monastery complex named after the village of Piyang, consisting of over 1,000 caves, which was only rediscovered in recent years.

Nearby is the site of the Donggar Ruins (Chinese 东嘎遗址, Pinyin Dongga yizhi, English Donggar Ruins / Donggar Grottoes). The two cave complexes - often referred to together as the Donggar and Piyang Grottoes (东嘎皮央石窟, Dongga Piyang shiku, English Donggar Piyang Grottoes) are the largest Buddhist grottoes discovered so far in Tibet and provide valuable material for researching the history of the Guge dynasty.