Though they may be most closely associated with the dramatic appearance of large creatures (such as alligators or raccoons), sanitary sewers are one of the most important pieces of infrastructure across the built-up areas of the world. For the past decade, Jon Schladweiler has collected copious amounts of material related to the history of sewage conveyance systems. Along with his various traveling exhibits and lectures, he has seen fit to create this rather intriguing website which contains articles, timelines, and visual materials that relate the history of the development of sewage systems over the past few millennia. The articles section is a good place to start, as it has dozens of historical articles that address the design of sewers, their various components (such as pipes and manholes), their construction, and even divides the articles up by locale and historical era. The photograph section is also well-developed, and contains a good section with photographs of public baths and latrines from antiquity. Finally, the site has a Miscellaneous area that pays homage to prose and poetry that have seen fit to describe sewers and their related pieces of infrastructure. Here visitors may read pieces by Robert Frost, Ben Johnson, and the Song of the Sewer from The Honeymooners.