In the town centre of Tashkorgan has an ancient ruin called the Stone City constructed many centuries ago by a Kingdom during their heyday. It was only left some walls such as this photo and the rest were just stones which I think collapsed from time to time. I observed closely at the way they built the wall, it wasn't stone but mud made.
View Full Image on Dreamstime
Username: Magicfanfan
Editorial: No
Width: 2816 pixels
Height: 1880 pixels
Downloads: 1
Image ID: 7293104