After you've thrown a coin into the Trevi fountain, you might think about your wish for a moment or two before moving on. But what lies beneath the Trevi District? Modern Rome was built on the back of its empire, and you'll discover how literal that is with tickets for this audio-guided tour beneath the Trevi district. Nine metres beneath the streets, extending from Via San Vincenzo to Vicolo Puttarello, you'll discover ruins that date all the way back to ancient Rome.