In 2009, three young enthusiasts rented the plot from the city and signed up their neighbours to convert it into a garden. Three years later, Prinzessinnengarten is not only a deliciously lush spot of green in a drab area, providing locals with a meeting point and the opportunity to experience the satisfaction one gets from growing something; it’s also economically self-sufficient.

This and more inspiring projects can be found in the print copy of A smart guide to Utopia or the ebook version.