In the Iranian province of East Azerbaijan, on the northern slope of an extinct volcano Sahand cunning Azerbaijanis once built a unique village. They knew that in a few centuries, their descendants will flood the crowds of tourists and they will only pay for the opportunity to look inside their homes. The fact that the houses in the village Kandovan carved in the rocks, each rock the house. Age some of them exceeds 700 years. The very nature of these grown-sharp fangs rocks, people can do is prodolbit in their room and insert windows and doors.