An aul (; lit. 'village') is a type of fortified village or town found throughout the Caucasus and Central Asia.
They are generally built out of stone, on faces of ridges or against cliffs in order to provide protection against surprise attacks. Houses are usually two stories high, and they are staggered to make it virtually impossible for enemies to get anywhere on the roads. The houses usually have a southern aspect to take advantage of the sun in the winter and to be sheltered from the northern winds. Often, they are not located near good farmland or water sources, so it is necessary to bring water into the settlement.