30 seconds long time exposure captured from inside the lava tunnel.
2.
This formed a roof over the river, enclosing it in a lava tunnel or tube.
3.
The largest lava tunnel on the island of S�o Miguel, the cave is located in the western edge of Ponta Delgada and extends for.
4.
In 1867, Frank Fouqu? on a visit to Terceira to study the submarine eruptions on Serreta, wrote of a lava tunnel at the entrance to the Guilherme Moniz caldera, referring to it as one of the more beautiful that he had visited.
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