In Japan, manhole covers have been elevated to an art. Nearly 95 percent of Japanese municipalities have designed their own custom sewer covers, according to Remo Camerota, a photographer and the author of "Drainspotting," a book that catalogs the unique art form. This cover is from the town of Matsumoto. Photo by jpellgen/Flickr CC.
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Japanese Manhole Covers

In almost every city in Japan, manhole covers have been elevated to an art form.