Willis Tower Glass Platform.

The Skydeck at Willis Tower, the highest observation deck in the U.S., offers a thrilling experience 1,353 feet above Chicago. Located on the 103rd floor, it features "The Ledge," five glass balconies that extend 4.3 feet from the building, providing breathtaking 50-mile views across four states: Illinois, Indiana, Michigan, and Wisconsin. Constructed with three layers of half-inch thick glass, each balcony can support up to five tons, ensuring safety and stability. In addition to stunning vistas, visitors can explore an interactive exhibit showcasing Chicago’s history and culture on the lower level. Originally an engineering marvel and once the world’s tallest building, the Willis Tower continues to captivate with its iconic design and modern features.