Holtzmann paper mill, Black Forest, Germany
Margaine’s research can take some unexpected routes. “It’s not a linear process – I can’t find the information in a library or newspaper archive,” he says. “When I publish a new place on my site, people can make comments – it reconnects people who have known the building, like factory workers or hospital nurses.” In this image, weeds grow around a piece of defunct machinery from a paper mill in the Black Forest. Although it closed in 2008, there is still a training centre on the site.