These are sand dunes located near Dunhuang. You can go trekking or camel rides which will bring you to the Moon Crescent Lake.
One of the most famous Buddhist grottoes in the world with many beautiful statues and wall art preserved for many generations.
choose evening domestic flight from Dun Huang to Urumqi and you will be able to see this. Don't forget to request a seat at the left hand side.
local people kept on digging caves on these cliffs and fill them with paintings and sculptures of buddhas. This tradition lasted for one thousand years.
In the heart of the desert, there is a Moon Spring - which the lake in the shape of moon where it never dry since 3000 years ago..