Photo: Wikimedia CommonsThis Oxfam charity shop in central Cologne is a well-stocked spot for secondhand clothes, books and bric-a-brac, with proceeds funding the work of the charity against poverty worldwide. Stock changes constantly and prices are kind. It is sustainable shopping with a social purpose. Rummage the rails for a preloved find, and remember that every purchase supports a good cause. Discover more of our social impact and sustainable shopping picks.