The Mogao Grottoes, also known as "1000 Buddha Cave", are located 15.5 miles southeast of Dunhuang City. With a total length of 1 mile, the Grottoes wind their way through the broken cliff at the eastern foot of Mingsba Hill. There are five layers of caves built into the mountain. According to historical records, the Mogao Grottoes were constructed in 366 BC. Today there are 492 caves in which murals and sculptures representing different dynasties have been well preserved. The Mogao Grottoes are listed in the World Cultural Heritage and are rated as key relics under state protection.