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The summit craters represent the junction area of the volcanic activity through which breathes the persistent vent of Etna, and in more or less regular intervals, are the site of explosive events of various types as: Strombolian obstruction phreatic activities etc. that continually change the morphology.
You will then walk to the summit craters (central crater-new mouth) at circa 3,300 m. Following your visit, you will then begin your descent by passing the north east crater and then go in the direction of the spectacular Valle del Leone. You will then arrive to the Pizzi Deneri volcanological observatory.