The Mogao Grottoes (Mogao Ku) are also known as the Thousand Buddha Caves. Dating back to the Han Dynasty, the caves contain Buddhist sculpture and frescoes from ten dynasties ending with the Tang. Despite the ravages of time, the winds and sand, 492 caves are still in existence and about thirty can be visited. They contain thousands of square meters of frescoes.
The Echoing-Sand Mountain, located 25km south of Dunhuang, is famous for the sounds the wind makes when blowing over the dunes. Especially the sunset at these Mountains, some are more than 100m high, is amazing.
Between two large mountains lies the Crescent Moon Spring, a beautiful oasis with a small pool of spring water which has a crescent moon shape.
The Yang Pass (Yangguan) sits 75m southwest of Dunhuang and was built up in the Hang Dynasty and has been ruined with great sections buried in the shifting sands. But still today one can see the foundations of some of the walls.
The Yumen Pass, 90km northwest of Dunhuang, was once a critical defensive pass protecting Dunhuang from invasion from the West. Today, there are two gates at the western and northern sides of the pass built with yellow clay.