Mount Etna is one of the world's most active volcanoes and is in an almost constant state of activity.
Mount Vesuvius is a somma-stratovolcano located on the Gulf of Naples in Campania, Italy.
Mount Somma is a stratovolcano located in the Metropolitan City of Naples, Italy.
The Hoyazo de Níjar is a remarkable geologic formation.
The Zuidwal Volcano is an extinct underwater volcano located in the Wadden Sea, off the coast of Friesland.
Mount Kazbek is a dormant stratovolcano and one of the major mountains of the Caucasus.
Cumbre Vieja is an active volcanic ridge on the island of La Palma.