The Rabaul caldera is part of the circum-Pacific Ring of Fire. It is located at the eastern end of New Britain Island, and island being part of the world's third biggest insular state, that is Papua New Guinea. With 14km by 9km the caldera is huge and due to remains of historic but nowadays volcanoes it's looking pretty spectacular. There is one small active volcano though, the Tavurvur, which means translated from Tolai language something like "ash spitter". And this volcano is truly living up to its name...
Tavurvur is a cheeky beast and is able to produce 4km high eruption columns as well as to toss truck-sized lava chunks some 1km wide. Nevertheless, in the light shining through the five layers of clouds of south east trade winds that volcano is pretty photogenic.
Here is my photographic reflection of the Rabaul caldera:
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