Map of the "Tunnel d'Anzin" and the "Aqueduc des fosses" (Coal mines Aqueduct) in Anzin, Valenciennes, Petite Forêt and La Sentinelle, in the north of France.
Limits of the map : N 50.3902, W 3.4559, S 50.3363, E 3.5529. Mercator projection.
Sources:
background: OpenStreetMap (CC-BY-SA-2.0)
DDTM du Nord: Anzin, Valenciennes, La sentinelle, Petite Forêt.
Sémhur (talk)
OpenStreetMap contributors