New images from the air show a mysterious village in China where residents live in underground yards for thousands of years.
There are about 10,000 such homes in Henan province, China, where only 3,000 people live, as others have moved to modern homes, according to Chinese media.
Residents of such houses called Yaodongs have six generations who live there in 200 years.
Though the tradition itself in China dates back 4,000 years ago.