Heard Island, Indian Ocean
In the Indian Ocean sits one of Australia's few active volcanoes (albeit not on the Australian continent): Heard Island. It has erupted numerous times over the last century, but its remote location means that we don't know much about these eruptions. We do know that it does have occasionally small lava lakes at the summit -- and very well may have one right now, according to satellite images and thermal signatures.
Image: NASA Earth Observatory
