The Willis Tower (formerly known as the Sears Tower): Famous for its iconic Skydeck, with glass boxes that extend out, offering breathtaking panoramic views of the Chicago skyline. It's just a few minutes away on foot from the Sheraton.
The Art Institute of Chicago: A world-renowned art museum housing an impressive collection of artworks, including notable pieces like "A Sunday Afternoon on the Island of La Grande Jatte" by Georges Seurat and "The Old Guitarist" by Pablo Picasso. It's situated just across Michigan Avenue from the hotel.