Mount Vesuvius sits just 9 km outside Naples, glowering imposingly over all around.
It is still active and experts believe a massive eruption is due some time soon. History has shown that the longer there is between eruptions the worst the new eruption is likely to be. There are around 3.7 million people living in the Naples urban area – a sobering thought.
Here are some views of Vesuvius from Pompeii, a reminder of the AD79 eruption.
And for anyone in or near London, there is the current Life and Death, Pompeii and Herculaneum exhibition, at the British Museum until 29 September 2013. Booking essential.