Historical structures are buildings or monuments that hold significant cultural, architectural, or historical value. They often reflect the artistic and engineering achievements of the time in which they were built, serving as a testament to human creativity and societal development. Examples include ancient temples, castles, and bridges that have stood the test of time. Preserving these structures is crucial for maintaining cultural heritage and educating future generations. They provide insight into the lifestyles, beliefs, and technologies of past civilizations. Notable examples include the Great Wall of China and the Colosseum in Rome, which attract millions of visitors each year.