Design and construction History 12 Buildings, structures, etc 4 September 11 Terrorist Attacks, 2001 4 Bridges 3 City planning 3 Monuments 3 more ... Skyscrapers 3 Statue of Liberty (New York, N.Y.) 3 Subways 3 Buildings 2 Economic assistance 2 Land use, Urban 2 Public buildings 2 Relations 2 Tall buildings 2 ARCHITECTURE / General 1 ARCHITECTURE / Urban & Land Use Planning 1 Art museums 1 Building failures 1 Construction and demolition debris 1 Ecological houses 1 Economic conditions 1 Environmental conditions 1 Exhibitions 1 Fires and fire prevention 1 Green technology 1 HISTORY / United States / State & Local / Middle Atlantic (DC, DE, MD, NJ, NY, PA) 1 International relations 1 Inventions 1 less ...