Rabul used to be known as the Jewel of the Pacific. A city built on the edge of a volcano and glittering blue bay. Unfortunately, that was a dumb idea and in 1994 it blew up. Smothering the city in several feet of thick grey ash. It has continued to do so ever since.
Firstly, location. It's north of the PNG mainland, near an island called New Britain.
https://teakdoor.com/Gallery/albums/u.../13657/png.jpg