In Auby: the slag heap 140 is the only visible trace of coal mining left today. This artificial hill is the result of the storage of mine waste, mainly sandstone and shale.
This small, flat slag heap is linked to several pits of the Compagnie des Mines de l’Escarpelle, but in particular to the former Pit No. 8; known as Port-Arthur (1906-1968). Built along a railway line, slag heap no. 140, also known as the marsh slag heap of the western vivier, was exploited for its economic value with earthworks following the cessation of coal mining. Development work was undertaken to make it more accessible. Today, located near a fishing pond, the site is considered a nature and leisure location.
Since 2016 it is part of the classified ‘Chaîne des terrils du Bassin minier du Nord de la France’ along with 77 others sites.
In Flines-lez-Râches: the Germinies Nord slag heap, a sensitive natural area located in the Scarpe-Escaut Regional Nature Park.
Covering 135 hectares, it consists of a vast slag heap on a plateau with a wetland area at its base. A paradise for lovers of flora and fauna, with 27 rare to exceptional species of flora, and the presence, during the nesting season, of the European nightjar, the slag heap and its surroundings constitute one of the region’s richest sites in terms of biodiversity.
In Flines-lez-Râches and Lallaing: the Germinies Sud slag heap, a 100-hectare paradise for fishermen and hunters. Access is regulated and guided tours are available.