Souterrains, le monde creusé par l'homme. Jérôme et Laurent Triolet. Carrières souterraines, champignonnières, villes souterraines, souterrains-refuges, habitats troglodytiques, tunelles de guerre, souterrains cultuels, catacombes.

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Angoumois (France), 2017



Once again, we had to pump the water before to study this ring shaped tunnel recently discovered because a collapse; region of Angoulême (France), July 2017.


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