Pint-sized Chicago Architectural Tour

What to do with a free day in Chicago? Walk the city and take pics of anything that strikes your fancy. Of course, what you'll find in Chicago is likely unlike any other city, save a few. Take a tour with me, won't you?

Out of Union Station, find the Lyric Opera of Chicago, right on the river front. 

Famous Marina Towers. Yes, plural. If you look really close, the building in the foreground is hiding its twin.

The Monadnock building is considered one of the first skyscrapers ever built. 

Though it now looks small by today's skyscraper standards, it used very thick concrete lower walls to support the floors above. 

And finally, what I will likely always call the Sears Tower, but is technically now the Willis Tower.