Located in the bay of Naples, this mountain erupted more than 50 times over the years. When it exploded in 79 A.D it destroyed Pompeii but the ash kept most of Pompeii in tact like its buildings, materials, and the bodies.

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Mount Vesuvius

Scientists say the the mountain is imminent to erupt again. When it does erupt it might cover more land than when it did in 79 A.D.