"Just drill deep below the existing homes that are hundreds of years old?" The centers of Prague and Rome aren't particularly new either. And IDK what is the g

"Just drill deep below the existing homes that are hundreds of years old?" The centers of Prague and Rome aren't particularly new either. And IDK what is the geology under Dublin, but under Prague it is fairly bad, broken layers of stone mixed with powerful springs of water. And all this could be managed in the 1970s already. Cities need transport.