Inside London's New Subterranean Urban Farm

London’s newest urban farm proves that with the right equipment, you can grow food just about anywhere. The 1,805-square-foot carbon-neutral project has one of the strangest locations of any city horticulture project. It’s located 115 feet below a busy South London street, inside a sprawling World War Two air raid shelter. The new farm, run by the company Growing Underground, opened its doors to the press for the first time this week and will release its first crops onto the market later this month.

Just off a major road, the surface entrance of the farm is a small warehouse—the size of a corner grocery store—that gives no hint of the experiment beneath. Founding a farm here is more than just a clever use of agricultural technology. It has created a literal secret garden.