The train is my time machine: a tour of Naples hidden ancient wonders

A new film about this corner of southern Italy reveals rarely visited villas, seismic landscapes and a civilisation buried mid-sentence - all accessible by trainOne by one, the visitors descend through a tight tunnel cut through volcanic rock into the damp foundations of the Teatro Romano buried beneath Herculaneum, with the weight of 2,000 years of city above them. This is a time machine, the guide says, and we are going back. It is pitch black as film-maker Gianfranco Rosis camera finds torchl...