Skydeck Chicago is an observation deck located on the 103rd floor of the Willis Tower, formerly known as the Sears Tower. It offers stunning panoramic views of the Chicago skyline and surrounding areas, making it a popular tourist attraction. Visitors can see up to four states on a clear day. One of the main features of Skydeck Chicago is the Ledge, a glass balcony that extends out from the building, allowing guests to look straight down to the street below. The deck also includes interactive exhibits that showcase the history and culture of Chicago, enhancing the visitor experience.