A milestone located in Bet Ḥananya, below one of the arches of the Hadrianic High Aqueduct to Caesarea (Canal B), was subjected to a 3D scan. This technique enabled the reading of the inscription on the milestone and thereby, to date the stone to the period of the dual reign of Emperors Marcus Aurelius and Lucius Verus (161–169 CE). It also became apparent that the stone marked the fourth mile station from Caesarea. This paper suggests that the milestone is in situ and marked a segment of the Roman imperial road between Caesarea and the legionary base at Legio. The road was submerged in the fourth century CE when a reservoir was created behind dams built across Naḥal Tanninim.