Return to the Salt Mines
One of the things I love about Chicago is that, despite the large collection of super-large world-class skyscrapers, the architecture isn't off-putting. Quite the opposite, in fact - it really draws the pedestrian in. My favorite buildings blur the boundary between sidewalk and inside so that you feel sheltered by the building, not walled off from whatever's inside.
And my number-one favorite example of this just happens to be the building where I work.
Yes, this was a good day.