"Casa del Migrante" in Huehuetoca, a suburb at the gates of Mexico City, is a safe haven for migrants. At least for two days. Then they must go on with their journey towards north in freight train carriages, which everyone here just calls "La Bestia," the beast.

The door slams shut behind him, the goal is clear: he urgently needs to pee. If only it weren’t for the others and the way they look at him. The noise, the pressure, the self-consciousness. A journey from the urinal to the cubicle.

2000 organisms in 514 living cells form a coral reef made of concrete and steel. Portrait of an invisible city.