The audio begins with the distinct sound of a train echoing in the distance, slowly growing louder. Soon, the mechanical hum of the subway carriages fills the air, reverberating against the cold, concrete walls of the ISAP Athens metro station. The sharp squeal of the train's brakes signals its arrival, followed by the hiss of the opening doors. In the background, the subdued chatter of passengers forms a consistent undertone, punctuated by the occasional loud announcement over the station's intercom system. The station, a symphony of people in transit, is alive with the sounds of footsteps tapping rhythmically against the tiled floor, bags rustling, and the faint strains of music escaping from someone's headphones. As the passengers board the subway, there is a brief moment of calm before the doors close with a soft thud. The train then lurches forward, leaving the station behind, its departure marked by the rapid, receding clatter of wheels against tracks.