Willis Tower.

Willis Tower, formerly the Sears Tower, stands as an architectural icon in Chicago, featuring 110 stories of groundbreaking design by Bruce Graham and Fazlur Rahman Khan. The highlight of your visit is the Skydeck on the 103rd floor, the highest public viewing area in the United States, offering stunning views of Lake Michigan and neighboring states. Thrill-seekers can step onto "The Ledge," a glass balcony extending 4.3 feet out, providing a heart-pounding perspective of the city below. The revamped tower includes interactive exhibits on Chicago's history and culture, plus sustainable amenities like retail and dining spaces. With dynamic lighting celebrating local events and easy access from multiple entrances, Willis Tower is a must-visit destination that encapsulates the spirit of Chicago.