Rome's history dates back nearly 3000 years. And, amazingly, some of its oldest heritage is either still in use like the Pantheon, still standing like the Colosseum or still visible like the Circus Maximus. But Rome is an historic iceberg; more of it lies underground than above.

Scratch the surface for Mussolini's World War II bunkers. Dig deeper and you hit ancient aqueducts and sewers still in use today. And if you burrow far enough, you'll discover the quarries whose stone built an empire. Lets take a look at underground Rome to explore what made the city so great.

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Fonte: L'italo-Americano