underground exploration

His documentaries like 'Cave of Forgotten Dreams' and narrative films obsessively explore humanity's relationship with subterranean spaces and hidden depths.

His films, particularly 'Snowpiercer' and 'Parasite,' use underground and below-ground spaces as metaphors for social stratification and hidden worlds.

His visceral cinema frequently descends into psychological and literal undergrounds, with 'Irréversible' and 'Enter the Void' exploring descent as both physical and spiritual journeys.