Click on the image below for a fascinating account of how services (water, phone, steam, sewage, travel) are delivered through underground in NYC. If you go to the link make sure you click on each of the embedded links in the annotated image. Just goes to show how complicated/organized complex societies are!!!
satya - Fri Aug 10 2012 15:08:20 GMT-0400 (Eastern Daylight Time)
The tour starts here
satya - Fri Aug 10 2012 15:09:06 GMT-0400 (Eastern Daylight Time)
Here is a high level view, but do visit the page above as it has links