Persia is well-known for their beautiful, hand-knotted rugs. The rugs are usually made with a cotton foundation and followed by a wool pile. They come in all sorts of colors and designs, but the most popular ones tend to be the red, blue, and green rugs. The city of Mashad is especially known for its high quality rugs. The rugs from Mashad are known for their thick piles and intricate designs. They are often made with handspun wool and natural dyes. The city of Mashad has been making rugs for centuries, and it is now one of the most popular places to buy Persian rugs.