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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Lava tubes



In the middle of the lava flows, the dark openings are lava tunnels entrances; these are the only accesses to the underground world (Snæfellsjökull, Snaefellsnes Peninsula, Iceland).


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Reference : 1344N002

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