A rare event was caught on camera over the weekend at Italy's Mount Etna, the most active stratovolcano in the world. The Sicilian volcano was seen spewing rare and nearly perfectly circular volcanic vortex bubbles – at some points, appearing pink in color against the sky. 

Giuseppe Barbagallo, a member of the South Etna Alpine Guides Group, told Reuters that a new pit crater formed along the volcano within the past week or so. The crater has a "perfect circled mouth," Barbagallo said, helping form the nearly perfectly circular rings of gas and vapor. According to Reuters, many locals are now referring to Etna as "Lady of the Rings" in light of the event.