The threshold of hell

Michael takes Alexander deep under Naples to look for the fabled river Styx which stood at the entrance to the ancient Roman underworld.

04 January 2017

2 minutes

This clip is from

Italy's Invisible Cities—Series 1, Naples

2500 years of history in a ghost station under Naples
Duration: 01:59
How a volcanic eruption kills
Duration: 01:34
The Naples firebrigade help Alexander and Michael to rediscover a giant cave system
Duration: 02:09
The cult of the abandoned souls
Duration: 01:32

Football the Florentine way—Series 1, Florence
Duration: 01:43
Uncovering the Secrets of Brunelleschi's Dome—Series 1, Florence
Duration: 02:56
2500 years of history in a ghost station under Naples—Series 1, Naples
Duration: 01:59
How a volcanic eruption kills—Series 1, Naples
Duration: 01:34