A skyscraper is a tall, continuously habitable building that has multiple floors and is equipped with elevators. These structures are typically designed for commercial, residential, or mixed-use purposes and are often characterized by their height, innovative design, and use of modern materials like steel and glass. Skyscrapers are iconic features of city skylines, representing economic growth and urbanization. The construction of skyscrapers began in the late 19th century, with notable examples like the Sears Tower and the Burj Khalifa. These buildings not only provide space for businesses and residents but also symbolize human ingenuity and the ability to reach new heights in architecture and engineering.