Was ist dran an "Hitlers Goldzug"?

For decades after the end of World War II, rumours persisted that the mountains of southwest Poland held a precious secret—a mysterious train laden with tons of gold, rare jewels and priceless art hidden by the Nazis in a secret labyrinth of tunnels. When 2015 two treasure hunters claimed that they had located “Hitler’s Gold Train” in the area of Walbrzych, the news made headlines all over the world. But what is the truth behind the alleged discovery? This documentary is looking for answers. (ZDF)