Look back a few hundred years at Boston. Half of the land is "new" anyway. Granted, I would imagine that it's hard/impossible to do this for a city that already

Look back a few hundred years at Boston. Half of the land is "new" anyway. Granted, I would imagine that it's hard/impossible to do this for a city that already exists and has lots of large, expensive, heavy objects in the way. http://www.iboston.org/rg/backbayImap.htm http://www.iboston.org/rg/backbayImap.htm