Mount Vesuvius is an active volcano located about 12 kilometers southeast of Naples, Italy. It’s part of the Campanian Volcanic Arc, a chain of volcanoes that runs along Italy’s western coast. This arc also includes significant geological features like the Campi Flegrei caldera to the west of Naples. If you're planning a visit, Vesuvius is easily accessible from Naples, making it a popular destination for tourists interested in history and geology.