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View of the main north-south street (cardo) looking south from the nymphaeum (backside visible in the lower-left portion of the image). There is a slight bend in the street in the right-center portion of the image.
On both sides of the street note the scattered columns. Outside of them, were covered walkways and numerous shops. The sixty-five foot [20 m.] wide street is itself divided into two lanes by a six-foot [2 m.] channel (in the center of the image proceeding away from the viewer). Freshwater flowed through this channel along the whole length of the street — from the nymphaeum to the Hellenistic Gate. The barriers inside of this large channel (visible) must have created visual and audible "rapids-effect."
Compare a similar center-of-the-street channel at Pisidian Antioch.
For a brief description of the biblical and historical significance of Perge click here.