Design and construction History 26 Buildings, structures, etc 13 Skyscrapers 13 Bridges 8 City planning 7 September 11 Terrorist Attacks, 2001 7 more ... Subways 7 Monuments 6 Economic conditions 4 Urban transportation 4 Architecture 3 Politics and government 3 Relations 3 Statue of Liberty (New York, N.Y.) 3 Tunnels 3 Buildings 2 Civil engineering 2 Economic assistance 2 Land use, Urban 2 Memorials 2 Office buildings 2 Planning 2 Public buildings 2 Structural engineering 2 Tall buildings 2 Anniversaries, etc 1 Bricklayers 1 Building sites 1 Building trades 1 less ...