The Cardo "Colonnaded Street" is one of the oldest roads in Jordan. It is still paved with the original stones with the ruts worn by chariot wheels still visible. The 800m Cardo, was the architectural spine and focal point of Gerasa. The colonnaded street was remodeled in the late 2nd century AD, probably after 170AD. The Ionic columns were replaced by more elaborate Corinthian columns. On either side was a broad sidewalk with shops, which can still be clearly seen. An underground sewage system ran the full length of the Cardo, and the regular holes at the sides of the street drained rainwater into the sewers.