Discover the hidden world beneath the Trevi Fountain on a guided tour of the underground archaeological site of Vicus Caprarius, also known as the City of Water. Located beneath one of Rome's most famous landmarks, this site preserves the remains of the ancient Aqua Virgo aqueduct, which has supplied the city with fresh water for more than 2,000 years.
You'll descend below street level to visit an archaeological area that reveals different layers of Rome's past. See the remains of an Imperial Roman domus, medieval structures and the castellum aquae, a monumental water reservoir built during the reign of Emperor Hadrian to support the city's water system.
As you explore, your guide will reveal the history, legends, and engineering behind the Trevi Fountain and the Aqua Virgo aqueduct, explaining how this remarkable underground site remained hidden for centuries before being uncovered during restoration works in 1999.
You'll also learn about the famous tradition of tossing a coin into the Trevi Fountain, the story behind the aqueduct's name, and the layers of history that make Rome one of the world's greatest open-air museums.
Just steps from one of the city's most visited monuments, this experience offers a different perspective on Rome by revealing the archaeological remains that lie beneath the streets of the Eternal City.
Guided tour
