The Furna do Enxofre, situated in the south-eastern part of the Caldeira da Ilha Graciosa, Graciosa Island, Azores, is an impressive lava cave.

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Size: 7619px × 5082px
Location: Graciosa Island, Azores, Portugal
Photo credit: © Joana Kruse / Alamy / Afripics
License: Royalty Free
Model Released: No

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