Fortresses are strong buildings designed to protect people and important places from attacks. They often have thick walls, towers, and sometimes a moat to keep enemies away. Historically, fortresses were built in strategic locations, like hills or near rivers, to provide a better view of approaching threats. Many famous fortresses, such as the Tower of London, have played significant roles in history. Inside a fortress, soldiers and their families could live safely while defending against invaders. Fortresses also served as storage for weapons and supplies. Today, many fortresses are popular tourist attractions, allowing visitors to explore their rich history and architecture.