Myths & Legends Great White Pyramid of Xi’an, China by Shelly Barclay July 21, 2012 by Shelly Barclay July 21, 2012 U.S. service members have allegedly seen a 1,000 foot white pyramid in Xi’an, China. If true, it would be the tallest pyramid in the world. Read more 1 FacebookTwitterPinterestRedditEmail