You can't miss the John Hancock Center if you happen to be passing through the North Side neighborhood of Chicago. A 100-storey expressionist design with a glass façade, it is the third-tallest building in the city and the fourth-tallest in the United States. Being a multi-functional structure, it houses restaurants, offices and condominiums too. And while you are here, enjoy the panoramic views that it offers—take a trip to the 94th floor and discover a breathtaking picture of Lake Michigan and the Chicago skyline. Talking telescopes provide information on the sites as you observe them, while an open-air sky walk allows you to experience the windiness of the Windy City from 1,000 feet up. You can also take a virtual tour of popular Chicago sights.