Khara-Khoto
Khara-Khoto, also known as Heicheng, is an abandoned city near the Juyan Lake in the sum of Bayan Toroi, about 25 kilometres (16 mi) south of the seat of Ejin Banner in Alxa League at the western end of Inner Mongolia, China. Built in 1032, the city thrived under the rule of the Tangut-led Western Xia dynasty.