We have seen large scale models of San Francisco 3D printed already, so why not a model of the entire city's sewer system? One artist has done just this on Instructables. Scott Kilder used information provided by the City of San Francisco to model, and then 3D print the entire system. It took him several tries, but eventually he used a Stratasys Objet500 3D printer and got it just right. More information on this odd, yet creative 3D printing project can be found here: http://3dprint.com/15624/san-francisco-sewer-3d-print/

Below is the completed 3D printed San Francisco Sewer system. What do you guys think?