If you are from Detroit, you recognize many of these "ghost signs" (otherwise known as old advertisements on buildings) because you grew up with Detroit brands like Vernor's and Faygo pop (yes, POP, not soda!) , Better Made potato chips and Stroh's beer. All these images were captured in Detroit, many of them no longer exist due to being tagged over or the building they existed in or on was demolished. And they still exist thanks to photography!