Create a stark and imposing image of Lunes-le-Saunier prison in southern France

Create a stark and imposing image of Lunes-le-Saunier prison in southern France, where Pascal Payet was kept. The prison should be depicted as a high-security fortress, with tall, thick concrete walls topped with barbed wire, and guard towers overlooking the facility. The scene should convey a sense of isolation and inescapability, with a view of the prison’s entrance gate, reinforced with steel and surrounded by harsh floodlights. The atmosphere should be cold and foreboding, with the prison set against a cloudy, overcast sky, emphasizing the severity and tight security of the facility where Payet was held.