Rome's Doomsday Gate to Hell

Hierapolis, in Western Turkey, is an extraordinary Roman city perched on top of dazzling white rock formations. This city hides a dark secret: the Romans believe it’s home to the Gate to Hell.

 Ancient historians describe a dark cave filled with vapour where animals mysteriously drop dead. But where is this deadly grotto, and what is killing the animals?

 Today, experts use the latest technology to investigate the ancient stories. We uncover graves filled with skeletons, and explore a lost sacred space, to unearth the truth about the Roman Gate to Hell.

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