Discover one of Rome’s most fascinating hidden worlds beneath the Trevi Fountain — where ancient engineering still works beneath the modern city.  Begin your experience at the iconic Trevi Fountain, where your expert guide reveals its myths, legends, and extraordinary engineering. With exclusive access to the restricted basin area, you’ll see the fountain from a rare and intimate perspective that most visitors never experience.  Continue your journey underground into Vicus Caprarius, the “City of Water.” This hidden archaeological site reveals the remains of ancient Roman life and the Aqua Virgo aqueduct, the same system that has supplied the Trevi Fountain with water for over 2,000 years.  This is more than a visit to a monument it is a journey through Rome’s hidden layers, uncovering the engineering and history that still shape the city today beneath one of its most iconic landmarks.