Once mistaken for the Great Wall of China, archeologists have unearthed an ancient city complete with a 70-meter (230-foot) pyramid, decapitated heads, and a bounty of precious gems. The 4,300-year-old stone city is now named Shimao, although its ancient name is unknown. At 400 hectares... Shimao is found in a region often been described in Chinese histories as a home to "barbarians". While little is known about the ancient city, its grandeur and intricacy suggest it was once politically and economically important in the region. The buildings were quarried from nearby sandstone whose extraction, transportation, and use were labor-intensive and...