British father and son filmmaking team Ted and Michael O'Neill believe they have found the source of the Aqua Traiana, the 2nd century aqueduct, constructed by the Emperor Trajan, 30-40km northwest of Rome. (photos)
Researchers have been looking for the source of the aqueduct for nearly a century. The aqueduct was used until the 10th century and rebuilt by Pope Paul V between 1605 and 1615. The rebuilt waterway is still in use for spring water today.
The O'Neills, who have spent several years researching Roman hydraulics, have filmed their discovery, including the "pristine brickwork" and the Renaissance restoration.