The most common material for building houses is mud-brick which acts as insulation to prevent heat, however, the design of these houses is incredibly beautiful and amazing.
Traveling to Yazd will teach you how people live in a desert town and how they adapt to it.
You will learn the mechanism of underground water supplement that is called Qanat, water reservoirs (Ab Anbar), icehouses (Traditional refrigerator), wind catchers (Air conditioning system), and pigeon towers (Used as a natural fertilizer for fields and farms).