Athens observed over the streets.
It can be seen as a European capital on the world, with migrants from other continents. Some we meet doing their shopping, returning home, taking the subway. Others seen washing the windshields of cars, gleaned from scrap or other things in shopping carts, load, unload and make-up spots in shops or stores, selling things on various sidewalks. Others seek food in the garbage. And there are drugs and prostitution too.
As in all major European cities, except that the proportions are reversed, immigrants who live "as the Greeks" are a minority, who live in and from the streets are the majority.
"The slave market" said an activist speaking of Athens. A mass of people forced to do anything to survive. Of "illegal" visible throughout the city center to the periphery.