Beneath the modern city of Madrid lies a vast labyrinth of subterranean galleries, tunnels and sewers – a perfectly devised system which controls the way the metropolis breathes. That the world above appears to function entirely naturally is attributable to a system of heavy-duty engineering and technological advancement. An unconventional, contemplative viewing experience that goes hand in hand with the film’s sophisticated audiovisual composition.
https://www.kviff.com/en/programme/film/5227952-the-hidden-city/