Boucle Noire - Black Loop
23 km Black Loop, an additional part of the GR 412 route called ‘Sentier des Terrils’ (slag heaps). (GR 412 Route: Borinage - Charleroi - Basse Sambre - Hesbaye - Bassin Liégeois).
‘Marchienne’ and ‘Monceau’ castles, ‘Martinet Mining site’ and its slag heaps and the chain of slag heaps at ‘Dampremy’ and 'La Docherie’
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