26.08.2025
During our child-friendly activity, young explorers dive into the fascinating world of slate – from its geological origins to its extraction and final products.
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A guided tour designed especially for children takes them 42 metres underground to discover the slate mine Johanna.
To round off the experience, the young visitors get hands-on: using a piece of slate, they craft their own medallion – a unique souvenir of an exciting underground adventure.
Entrée principale, (CR311)
8823 Haut-Martelange
Tuesday, 26 August 2025 - 14h00
: 1.5€
T : +352 23 640 141