Back alleys of American cities for me are one of the most attractive assets of urban structures.
They are the underdog streets. No permission to wear street names. Not intended to show the back sides of buildings so urban design does not exist. A biotope for plants and animals. Rest space for workers during breaks. Spaces without attention developing specific skins. Graffiti can survive here, and things of the past, long forgotten. But at night they are fully illuminated.
Keeps the fear away.
I am currently on travel in CO, NM, AZ and Chicago.