World Trade Center
But balancing quality and cost is no easy task.
Forty years ago, the EPA's Documerica project captured the first weeks of life in Lower Manhattan after the Twin Towers debuted.
A 400-foot tall spire will be attached for good some time in the next several weeks.
The original Twin Towers had trouble finding tenants, but the new buildings are off to a promising start.
Long-time city photographer Steven Siegel recalls one of his favorite subjects, the World Trade Center.
When you love a city, every change in its skyline is a sign of how it has aged with you.
The building height of One World Trade Center rose above 1,250 feet today, surpassing the Empire State Building.
The average height of towers is climbing — but how high is too high?