Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The underground is "Roman ...

Sprawling across the valley of the Colosseum and the Palatine and Esquiline Hill in central Rome are the remarkably well-preserved remains of Emperor Nero's Domus Aurea, his so-called Golden House.

From imperial residences to apartment complexes and temples, these hidden sites offer a new window into Rome's layered past. Rome is a city of layers, and it's possible to tour the ancient ruins 30 ...

Much of ancient Rome, of course, "remains hidden under visitors' feet," said Tony Perrottet in Smithsonian. Visit the Pantheon or the Colosseum and you'll notice that the buildings' foundations sit ...