Mont Vesuvius is the most famous volcano in the world, because it was the one who destroyed Pompeii in A.D. 79. Also it's the most dangerous volcano in the world, first of all, because it's still an active volcano then, because of the people that live close to the volcano which are about 900.000. Pompeii and Erculaneum are the most famous italian archaeological sites, every year over 2.000.000 of people visit Pompeii. The ruins of Pompeii and Erculaneum are for sure the best preserved italian archeological sites because the towns were buried quickly by ash and lava. If you are interested in the history of Pompei and Herculaneum booking a licensed tour-guide is the best way to visit the ruins, of course, a quiet stroll enjoying, villas, graffiti, frescoes and buildings, is a good way to visit the ruins.