Located Southeast of Tianshyui City in Gansu Province on a 142 meters high hill named Maijishan, meaning "Wheat-pile Hill". Work on the grottoes started in the late 4th century and continued through successive dynasties until the 19th century. There are 194 existing caves, in which are preserved more than 7,000 sculptures made of terra cotta and over 1,000 square meters of murals. Earthquakes, rain and fire have damaged a large part of the caves and wooden structures. But still worth a visit!