This model has since been moved to the Israel Museum......
If you plan on visiting the "City Of David", the oldest part of the city of Jerusalem (this is not the walled city familiar to us today), then I would suggest visiting the Israel Museum and the model first, it will give you a three dimensional idea of what you will be walking in.
There is a scale model of old Jerusalem that you can walk around and see what it would have looked like several thousand years ago. It is situated at the Holy Land Hotel in Jerusalem.
The photo is from my friend Steve at www.eduresources.org/
The rest are mine from our visit to the new site during the VT Jerusalem Meet 2008.
One place that is unique, is the old city model of the city 2000 years ago which you can see at the hotel hollyland.