Algar do Carvao, an ancient lava tube in Terceira Island

Algar do Carvao, an ancient lava tube in Terceira Island

Algar do Carvao, an ancient lava tube in Terceira Island - Stock Photo - Images

Algar do Carvao or Cavern of Coal in Terceira Island, Azores, Portugal. It is an ancient lava tube or volcanic vent located in the central part of the island of Terceira in the Portuguese archipelago of the Azores

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