Manhattan is made on made-up ground

[Deluks]

http://www.bbc.co.uk/news/world-us-canada-10649949

No wonder the bloody towers fell over!

 

[ColJack]

that's under the street / car park of an adjacent building, it wasn't under the footings of the WTC.. but yes it's common knowledge that manhatten was expanded..

 

[geraint]

that's under the street / car park of an adjacent building, it wasn't under the footings of the WTC.. but yes it's common knowledge that manhatten was expanded..

in what way.... manhattan has solid ground. hence the skyscrapers so close together... and their system of heating..