This episode explores El Djem Amphitheatre, Tunisia, a colossal dynastic monument that bore witness to violent and bloody spectacle.Also explored: Fort Amador in Panama, a military base on the frontlines of a battle between the United States and a drug-running tyrant that had allegedly once been a CIA asset. In the foothills the Italian Alps, a community built on utopian ideals, in La Serra Ivrea. In the heart of the Polish capital of Warsaw stands Mokotów Prison, a grisly facility that once caged members of a revolutionary movement.