Cobblestone streets are roads paved with small, rounded stones called cobbles. These stones are often made from granite, limestone, or other durable materials, and they are set closely together to create a sturdy surface. Cobblestone streets are commonly found in historic towns and cities, where they add charm and character to the environment. These streets were popular in Europe during the Middle Ages and are still preserved in many places today. Walking on cobblestone can be uneven, making it important for pedestrians to watch their step. Many tourists enjoy exploring these streets for their unique beauty and historical significance.