Once you start to notice them, you see them everywhere. And they offer a unique glimpse into Milwaukee's past.
Ghost signs are those hand-painted signs seen on the sides of buildings, often advertising bygone products or businesses.
Photographer Adam Levin runs a Facebook group called Old Milwaukee and has taken countless photos of ghost signs and other cool historical gems around the city.
He teamed up with OnMilwaukee's Bobby Tanzilo for this edition of Urban Spelunking dedicated to ghost signs, and he joined me in studio to talk about their recent photo essay.
