Although this picture looks like flies trapped in a spider's web, it's actually a team of painters working on the Brooklyn Bridge back in 1914. A well as capturing a moment of innovation during the construction of an iconic building, there's a further story behind this picture.
It's the work of Eugene de Salignac, who photographed every major construction project in New York during his lifetime. The only issue was that he didn't tell anybody. His incredible work wasn't discovered until 2007, by which time he'd been dead for sixty years.