Only road leading to Mogao Grottoes damaged by floods

The Mogao Grottoes is home to collections of Buddhist artwork -- more than 2,000 colored sculptures and 45,000 square meters of murals -- in 735 caves carved along a cliff.

It was first constructed in 366 AD For more than 1,000 years, it was a popular marketplace, travelers' stop, and a religious shrine on the ancient Silk Road. The local arid climate with less rainfall is a major reason that the heritage site has been preserved for thousands of years.

It receives over 1.7 million tourists every year. The grottoes were placed under the management of the Dunhuang Academy of China in 1944.