From the Guardian: Roman remains threaten metro.

A planned hi-tech driverless underground railway line set to bring desperately needed transport links to the historic heart of Rome has run into a minefield of Roman remains.

Planners aim to send the new C line under the city centre at a depth of 30 metres, well beneath the archaeological treasures that litter Rome. Stations will also be built deep underground, but even the simple task of digging entrances and exits is proving a headache and could mean the scrapping of the Largo Torre Argentina stop, which serves crowded tourist sights such as the Pantheon. [continue]