Naples, two thirds of the way down Italy’s west coast, is the country’s third largest city with a population of 2.373 million. It sprawls up from the bay at its feet and is separated from the Amalfi Coast by Vesuvius and Pompeii. Centuries of geologists, historians, artists, and adventurers have all visited its treasures and each has left their mark on a city that is now tourist-wise and wary. This summer we called in – our first encounter of substance was with the tangenziale.