Gone are the days of Old MacDonald-style countryside havens—the most exciting developments in small-scale agriculture are happening in warehouses and on rooftops across the world’s cities. “Urban farming” is more than just a buzzword your farmers’ market kale provider uses as an excuse to charge you two bucks extra. It’s a field that’s driving some of the most futuristic, fascinating methods of turning brick and concrete into stuff we can eat.

Click through for a collection of the world’s coolest urban farms, from London to Shenzhen.