The ruins of a round tomb building and the well-preserved Pollio Aquaduct dated back to the reign of Augustus stand out on the Tralleis (modern Aydın) and Magnesia road. The round building is located in an olive grove to the east of the highway opposite the small restaurant at the entrance to Yeniköy 3,8 km from Selçuk. It was a monopteros about 1.80 m high with six columns bearing Corinthian capitals between which were statues on a podium with a sitting bench all around. There was most probably a burial chamber in its interior. In the middle of the conical roof on the richly decorated architrave was an acroterium with acanthus leaves. It is assumed that this tomb and a villa with mosaic flooring in its interior which is located near the tomb belonged to the renowned Vedius family due to a metrical tomb inscription dated back to the 2nd century AD. Two-tiered aquaduct crosses the Denenddere river and gorge which was called Marnas in the antiquity with three large arches on the lower tier and with six smaller arches on the upper tier. Under the eastern arch on the lower tier is the bed of the river today as well; The ancient road passed through the middle and western arches which are larger as we understand from the asymmetrical inscription on the arch. Bases and arches are built with hewn stones and the imposts and arch pediments are determined by a plain moulding. There are inscriptions on the architraves above the arches. On the upper tier are remnants of a cornice on which is the duct where water was running within an Attica band. The walls adjacent to the aquaduct on the sides were built with small stones and mortar in orderly rows. In the building inscription in two lines, the upper one being in Latin and the lower in Greek, which is located on both sides of the aquaduct is inscribed that C. Sextilius Pollio, his wife Offilia Bassa and his stepson C. Offilius Proculus had that structure built out of their own resources in the honour of Augustus, Tiberius and the people of Ephesus. Due to the fact that the name of Tiberius is mentioned, it is understood that the structure was built between AD 4 and 14. This aquaduct is a part of the Aqua Throessitica which was mentioned in the written sources and built by the Emperor Augustus and satisfied the water needs of Ephesus.