There was a interesting book I had when I was a kid. Its was about all the underground infrastructure by David Macaulay. Google books has some pages : https:

There was a interesting book I had when I was a kid. Its was about all the underground infrastructure by David Macaulay. Google books has some pages : https://books.google.com/books?id=Lqav0No51cEC&pg=PA92&source=gbs_selected_pages&cad=2#v=onepage&q&f=false https://books.google.com/books?id=Lqav0No51cEC&pg=PA92&sourc...