This centre dedicated to metallurgical know-how is spread over four sites, the largest of which is Dommartin-le-Franc. A sound and light show depicts the work of smelting around the 1834 blast furnace, while other installations add further insight into these industrial trades. The three other sites consist of an itinerary along the paths of the Blaise Valley, an overview of the history of the Vecqueville plant and a walk through the Poissons open-pit mines.