Three striking headframes from three different eras stand in the German Ewald coal mine, which closed its doors in 2000.
In the 19th century, the tentacles of the Walloon coal industry in Belgium reached deep into the German Ruhr area.
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A collapsed and flooded complex of mining galleries stretches between 600 and 800 metres below the cyclocross World Cup 2025 course in the northern French town of Liévin.
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