Geographic setting.

Ancient Histria was situated on a peninsula, about 5 kilometres (3 mi) east of the modern Romanian commune of Istria, on the Dobruja coast. The ancient seashore has since been transformed into the western shore of Sinoe Lake, as the Danube's silt deposits formed a shoal which closed off the ancient coastline. The current Sinoe Lake was at the time the open northern bay, while another bay on the southern shore served as the port. The acropolis with sanctuaries was established on the highest point of the coastal plain. The settlement itself, erected in the 6th century, was 1/2 mile (800 meters) to the west of the acropolis. The settlement had stone paved streets and was protected by strong wall. Water was collected along 12.5 mile (20 km) long aqueducts.

(http://en.wikipedia.org/wiki/Histria_%28ancient_city%29)