Parts of Saxony and the Czech Republic form a World Heritage Site. And the mining past has left marks around Altenberg. Reporter Hannah Hummel visits the Altenberg sinkhole and heads underground in Zinnwald.
Parts of Saxony and the Czech Republic form a World Heritage Site. And the mining past has left marks around Altenberg. Reporter Hannah Hummel visits the Altenberg sinkhole and heads underground in Zinnwald.
