Although Cloud Gate isn’t necessarily a building, I think it counts as a structure, and I love it. My aunt lives in Chicago and I remember when we went to go see her when I was little I would always ask to go see the ‘shiny bean’. Cloud Gate was built by Anish Kapoor in 2006 and resides in Millennium Park. If you haven’t ever been to Chicago, GO! There are some great buildings there and this is definitely a place you should go to.