Cobblestone refers to naturally rounded stones that were historically used for paving streets and walkways. These stones are typically larger than pebbles and smaller than boulders, making them ideal for creating durable surfaces. Cobblestones were commonly used in urban areas during the Middle Ages and can still be found in many historic towns and cities around the world. The use of cobblestones has declined with the advent of modern paving materials like asphalt and concrete. However, they remain popular in certain areas for their aesthetic appeal and historical significance. Cobblestone streets often evoke a sense of nostalgia and charm, attracting tourists and preserving the character of places like Old Towns and historic districts.