Unknown Loop Streets #3... "W. Arcade Place"...
Cobblestones are not a common sight in the center of the Loop. The poles used to tether your horse are not old, they certainly wouldn't stop a determined horse.
This is the only north/south section of W Arcade Place, where it turns in the center of the block. It looks more like an alley, but it is an official street.
The East end of W. Arcade Place ends up on Madison between Clark and LaSalle.