The remnants of a 3,000-year-old altar to the sun have been discovered in north west China's Xinjiang Uygur Autonomous Region.
It is believed to have been built by the tribes that once inhabited the grassland in three circular layers, using stones that archaeologists believe must have been pulled to the site from many kilometres away by men and horses.
Experts say the altar, which is 100 metres in diameter, closely resembles the heaven-worshipping altars of the dynasties that once ruled China
