Inside a farm hidden under the streets of Paris in an abandoned parking garage

Something is growing underneath La Chapelle, a neighborhood north of central Paris.

It's an underground farm by Cycloponics, a local indoor farming startup that harvests lettuce, herbs, and mushrooms in a space it calls la caverne (the cave).

The farm uses an agricultural technique called hydroponic farming, in which greens are grown under LEDs in nutrient-rich water without sunlight or soil.

Take a look inside.