Caves and Lava Tubes

Algar do Carvao on Terceira, a vertical volcanic chimney, Furna do Enxofre on Graciosa, and Pico's Gruta das Torres lava tube, about 5 km long; most are visited with a guide, helmet and torch.

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GetYourGuide does not provide a product photo for this activity — the image shows the meeting point, photographed by us.