This episode explores Fort Sherman, Panama; Radunsti Hospital, Bulgaria; Rocchetta Mattei, Italy; and Siemensbahn Railway, Berlin, Germany.A jungle stronghold in Panama built to defend a prized American possession that soon faced the threat of an elaborate Nazi conspiracy. In Italy, an eclectic hilltop structure built to be the home and laboratory of a reclusive scientist making grand claims. A ghostly railroad cutting through the German capital of Berlin, that became a potent symbol of a city divided. And, in the rugged mountains of Bulgaria, a brutalist structure that once offered hope to its residents, devastated in the wake of Communism collapse.