A fortress is a strong building designed to protect people and important things from enemies. These structures often have thick walls, towers, and sometimes a moat to keep attackers away. Fortresses were commonly built in strategic locations, like hills or near rivers, to provide a better view of the surrounding area. They served as safe havens during battles and were essential for defense in ancient times. Many famous fortresses, such as the Tower of London and Fortress of Louisbourg, showcase impressive architecture and history. Today, some fortresses are preserved as historical sites, allowing visitors to explore and learn about their significance in protecting communities throughout the ages.