Travelers are voting Cloud Gate, Chicago Water Tower and Michigan Avenue as the best of 97 key buildings in Chicago. There are 95 key buildings in Markham a city just 30 km from Chicago and 22 key buildings in Joliet which is 30 km distant. The most popular of these are Cloud Gate in Markham and Willis Tower in Joliet. You can find 113 key buildings in Illinois and 2813 key buildings in the country of United States. Our members favorite in Illinois is Cloud Gate and Independence Hall is the top pick in United States. Want more? Check out our map of key buildings in Chicago.