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South Limburg is full of caves and mines, all to extract marl. During World War II, a vault was built in the Sint Pietersberg in Maastricht to protect all the art treasures of the Netherlands. BECOME A FRIEND OF THIS CHANNEL! https://petjeaf.com/weetjedatookweer MERCHANDISE https://shop.weetjedatookweer.nl/ DO YOU HAVE A GOOD STORY? CONTACT US! [email protected] https://weetjedatookweer.nl Instagram: @weetjedatookweer DISCLAIMER The content of this video is not complete, but it is original. This story has no journalistic intention, we are purely interested in the wonder of the subject.