Cave dwellings (or Yaodong in Chinese) are a unique style of traditional houses on the Loess Plateau of westerncentral China. They exhibit rich folk customs and a flavor of the surrounding environment. The soil of the Loess Plateau is thick and compact, making it the ideal place for building caves that are sturdy enough to last hundreds or even thousands of years without collapsing. Most cave dwellings have straight walls and low arched ceilings, with the walls reinforced with grass and mud. Cave dwellings are comfortable to live in, being cool in the summer and warm in the winter. Being cut into the mountain, the architecture blends in quite well with the surrounding natural environment, while the rust exterior exhibits the beauty of ingenuity.