The eastern ridge was flanked on the east by the Kidron Valley, which joined the Hinnom in the south and ran nearly parallel to the Tyropoeon on the other side of the eastern ridge.The Kidron separated Jerusalem from the Mount of Olives in the east.
The Western Ridge was flanked by the Hinnom Valley, which ran along its western and southern slopes.
The Hinnom, or Gehenna, Valley was associated with hell and sheol throughout the Old Testament.
The southwestern hill became known as the Upper City.
During Herodian Jerusalem, Herod built his palace in the Upper City.
"As the mountains surround Jerusalem, so the Lord surrounds His people from this time forth and forever."In Isaiah 66 all the nations are pictured as bringing sacrifices to "My holy mountain Jerusalem", as declared by the Lord through the prophet Isaiah.
It becomes quite evident the history of Jerusalem covers the entire time period of the Old Testament.
It was over this valley Christ would often gaze on Jerusalem and the Temple Mount from the slopes of the Mount of Olives in the New Testament.
Between the two ridges another valley ran, the Tyropoeon Valley, mentioned above.
Water plays a significant role in Jerusalem history, as it does in the history of the Ancient Near East.
A steady supply of water equates with longevity, and Jerusalem fit the mold.
This valley clearly defined the Eastern and Western Ridges from each other.