Cattle wander between the concrete shells of half-finished mansions in northeastern China, some of the only occupants of a luxury complex. Property giant Greenland Group broke ground on the development nestled in the hills around Shenyang, an industrial city of 9 million, in 2010. But around two years later, the State Guest Mansions project -- lavishly planned as 260 European-style villas complete -- was abandoned.  IMAGES