Ancient picture of Santa Bárbara caldera, in Terceira Island, part of the Azores Archipelago, in Portugal. The image also shows a vulcanic formation, known in the Azores as a "mistério" (mistery), that crosses the caldera.
This photograph was published in the Gazeta dos Caminhos de Ferro magazine No. 1091, of 16th June 1933, and scanned by the Hemeroteca Municipal de Lisboa.
Unknown author<span style="display: none;">Unknown author</span>
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