Day 1:

Start your day by visiting Millennium Park, where you can see the famous "Bean" sculpture and take a stroll around the park. From there, head to the Art Institute of Chicago, one of the oldest and largest art museums in the United States. Spend a few hours exploring the museum's impressive collection, which includes everything from ancient artifacts to contemporary art.

In the evening, head to Navy Pier, where you can ride the Ferris wheel and enjoy dinner at one of the many restaurants on the pier.

Day 2:

Begin your day by taking an architecture boat tour of the city's iconic buildings and skyscrapers. The tours offer a fascinating look at Chicago's history and architecture, and are a great way to see the city from a unique perspective.

After the boat tour, head to the Willis Tower Skydeck for stunning views of the city from 1,353 feet above ground. Be sure to check out "The Ledge," a glass balcony that extends out from the building and offers a thrilling experience for visitors.

In the evening, head to the Magnificent Mile, Chicago's premier shopping destination. The street is home to a variety of high-end retailers, luxury boutiques, and department stores, as well as a variety of restaurants and hotels.

Day 3:

Begin your day by visiting the Museum of Science and Industry, the largest science museum in the Western Hemisphere. The museum features over 400,000 square feet of exhibits and interactive displays, including a World War II submarine and a giant heart exhibit.

In the afternoon, head to Lincoln Park Zoo, a 35-acre zoo that is home to over 1,200 animals from around the world. The zoo is free to enter and offers a variety of exhibits and educational programs for visitors of all ages.

In the evening, head to a local restaurant to sample some of Chicago's famous food, such as deep-dish pizza, hot dogs, or Italian beef sandwiches.

In conclusion, three days in Chicago provides enough time to experience some of the city's most iconic attractions, from the Art Institute of Chicago to Navy Pier and the Willis Tower Skydeck. By following this itinerary, you'll get a taste of what makes Chicago such a unique and exciting destination.