Saar-Warndt coal mining basin
Saar-Warndt coal mining basin is an area of Germany and France. It has been shaped by two centuries of coal extraction from the start of the 19th century to the start of the 21st century; and it represents a significant period in the history of European industrialisation.
Source: Wikipedia — Saar-Warndt coal mining basin (CC BY-SA 4.0)