I had the chance to go twice on the Etna Volcano in Sicily.
First trip was while going through a post-graduate formation on natural hazards and their mitigation. We went there with a Swiss scientist working for the USGS, specialized in the seismic signal or "long period events" associated with the rise in pressure due to the magma welling up from deep within the Earth. We were also joined by some volcanologists from the University of Catania.
Second trip was with a friend on a weekend in 1992, during a small eruption that took place in the Val del Bove. It just happened that we were on the volcano at the same time as Haroun Tazieff, a famous volcanologist and cinematographer who was filming a TV documentary series on his life that he spent studying and popularizing the volcanoes from all over the world.
Taormina is a beautiful small city located along the Sicilian coast, at the foot of the volcano.