The Vespasianus Titus Tunnel is an ancient water tunnel built for the city of Seleucia Pieria, the port of Antioch (modern Antakya), in the 1st and 2nd centuries AD.

[1] It is located at the foot of the Nur Mountains, near the modern village of Çevlik, 7 km (4.3 mi) northwest of central Samandağ (the medieval port of Saint Symeon) and 35 km (22 mi) southwest of Antakya.

[1] The construction of the tunnel was ordered by the Roman emperor Vespasian (reigned 69–79 AD) to divert the floodwaters running down the mountain and threatening the harbor.

The construction began under Vespasian and continued under his son Titus (r. 79–81 AD) and his successors.

[1] The tunnel was added to the tentative list in the cultural category of UNESCO World Heritage Site on 15 April 2014.