Two girls grow up in a poor Naples neighbourhood in the 1950s, one pushed on by school, the other by sheer brilliance. Elena Ferrante's four Neapolitan Novels follow their friendship from a doll thrown down a cellar chute to a package in the mail in 2010.
The route runs from the district of the first book through Ischia, Pisa, San Giovanni a Teduccio and Florence to Turin. The books never name the streets, so most pins mark areas, not buildings.
Tom Ripley is paid $1,000 to travel to Italy and persuade Dickie Greenleaf to return to the United States. Claiming to be a former Princeton classmate, he slides into Dickie's life, and a friendship at the seaside turns into a trail of lies and killings.
The route follows the film's order through Ischia and Procida, Anzio, Naples, Rome and Venice. Many places play other places: Ischia and Procida stand in for the fictional village of Mongibello, Anzio plays San Remo, and the "Roman" opera house is in Naples.
In AD 79 a mountain above the Bay of Naples blew apart. Pliny the Younger watched from Misenum across the water, lost his uncle, the admiral Pliny the Elder, to the eruption, and years later described it for the historian Tacitus in two letters: the only eyewitness account that survives.
The route follows the eruption in the order of its events, from the mountain's first column to Pompeii, Herculaneum, the beach at Stabiae and back to Misenum. Pliny's letters never mention Pompeii or Herculaneum, so those stops come from archaeology. The traditional date is 24 August, but newer evidence points to the autumn.