In London, Thames Water's chief flusher, Rob Smith, leads a guided tour of the city's bowels.
The 8-minute video is heavy on the gross-out factor, but also offers a unique perspective on the patterns and peculiarities of urban digestion. After all, as I've written elsewhere, "If the ways in which a city is supplied with food are often hard to visualize, the infrastructure through which that food, transformed into metabolic excretions, is once again removed are usually even better hidden"—which makes this video required viewing for anyone interested in food and the city.