Significant sections of a Roman aqueduct survive in the Kadifekale neighbourhood of İzmir, their tall stone arches rising incongruously above modern residential streets. The aqueduct dates from the fourth century CE and supplied water to the ancient city of Smyrna from the hills to the east.
The surviving sections are freely visible and accessible — they stand in the middle of ordinary streets and gardens, incorporated into the urban fabric rather than fenced off as a formal monument. The contrast between the massive ancient stonework and the surrounding apartment buildings is striking. Worth a short detour if you are visiting Kadifekale.