Mount Etna’s Blows Spectacular Smoke Rings 

One of the most interesting facts about Mount Etna is that it is the highest active volcano in Europe and one of the most active in the world. Over time, it has produced more volcanic vortex rings than any other volcano globally. These rings are formed by a unique combination of rapid gas release and the specific shape of the vent, resulting in near-perfect circles of smoke, steam, and other gases that can stay airborne for several minutes,Italy's volcano Mount Etna make smoke rings and lights up Sicilian sky
Mount Etna's continuous activity, including frequent eruptions and gas emissions, has even led to significant changes in its height.