From the NY Times:
"URBAN FRONTIER Erling Kagge led an expedition that revealed an entirely new way of understanding the city. It included a hike in Tibbetts Brook, which runs through a Bronx sewer.
By ALAN FEUER
Published: December 31, 2010
IT must have been the third or fourth day — time, by that point, had started to dissolve — when I stood in camping gear on Fifth Avenue, waiting as my companions went to purchase waterproof waders at the Orvis store. We had already hiked through sewers in the Bronx, slept in a basement boiler room, passed a dusty evening in a train tunnel; we were soiled and sleep-deprived, and we smelled of rotting socks. Yet no one on that sidewalk seemed to notice. As I stood among the businessmen and fashionable women, it dawned on me that New Yorkers — an ostensibly perceptive lot — sometimes see only what’s directly in front of their eyes...."