Did you know about this hidden waterway beneath a Polish city? #historyofpoland00:00:38

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Uncover the fascinating history of the Queen Louisa adit, a 14-kilometer tunnel that drained coal mines and transported coal to the Baltic Sea. Today, its a one-of-a-kind underground tourist experience.

#HiddenHistory #QueenLouisaAdit #IndustrialHeritage #CoalMining #UndergroundTour #HistoricalEngineering #PolandHistory

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