Cave dwellings are found all over Northern China including Shanxi, Gansu, Shaanxi and Henan provinces along the Loess Plateau. Having selected a good place, local people would dig a large pit and dig caves at the four sides, a tunnel leading to the ground at one side and a well in the center of the pit and build low walls at the four sides. The courtyard cave dwelling is warm in winter, cool in summer along with being both rain and fireproof. The pits of different families sit close to each other. [Photo/CFP]