Yakhchāl (Persian: یخچال; yakh meaning "ice" and chāl meaning "pit") is an ancient type of evaporative cooler. It was developed in Persia over 2,400 years ago, and was used to produce and store ice in the desert. Yakhchāls are large, conical structures with a thick, insulated interior. They are typically made of mud brick or stone, and are often decorated with intricate … [Read more...] about Yakhchāl: A Persian Marvel of Ice Production and Storage