Victor Moreno's The Hidden City (La cuidad oculta) is a dark, unsettling, almost hallucinogenic journey into an unknown world: the labyrinthine sewer system beneath the city of Madrid, Spain. Filmed underground over several years, the film offers unprecedented access to the vast network of tunnels, sewers, machinery, and infrastructure that at once sustainsÑand stands in stark contrast toÑthe life above it. With otherworldly cinematography and sound design reminiscent of Kubrick's 2001: A Space Odyssey and other sci-fi classics, The Hidden City is a contemporary symphony of an underground metropolis that demands to be heard in a darkened theatre and seen on the big screen.