Hop on hop off cruise romer r tour the eternal city rome whilst floating on its most ancient and famous river the tiber and this isnandrsquot just an escorted sightseeing tour you can hop on and off at any places that interest your r stops include tiber island or isola tiberina close to piazza venezia romeandrsquos central hub and the mouth of truth statue that is said to act as a lie detector youandrsquoll also be able to hop off and on at the historic ponte sisto bridge castel