A "Tower" is a tall, narrow structure that often serves various purposes, such as observation, communication, or support. Towers can be found in many forms, including lighthouses, radio towers, and skyscrapers. They are typically built to provide height for better visibility or to house equipment. Towers are constructed using materials like steel, concrete, or wood, depending on their intended use and location. Some famous examples include the Eiffel Tower in Paris and the Burj Khalifa in Dubai. Towers can also be part of castles or churches, often featuring architectural designs that reflect their historical significance.