Castillos, or castles, are large fortified structures built during the Middle Ages, primarily in Europe. They served as residences for nobility and were designed for defense against invaders. Castillos often feature thick stone walls, towers, and moats, reflecting the architectural styles of their time. Many castillos, such as Neuschwanstein Castle in Germany and Edinburgh Castle in Scotland, are popular tourist attractions today. They showcase historical significance and architectural beauty, often surrounded by picturesque landscapes. Castillos also played a crucial role in the feudal system, symbolizing power and protection in their respective regions.