Steve Duncan: "As an urban historian & photographer, I try to peel back the layers of a city to see what's underneath. From the tops of bridges to the depths of sewer tunnels, these explorations of the urban environment help me puzzle together the interconnected, multi-dimensional history and complexity of the great metropolises of the world."
The New York Times (on another similar venture): "The trip’s conceiver, Erling Kagge, a 47-year-old Norwegian adventurer, had ascended Mount Everest and trekked on foot to both the North and South poles. His partner, Steve Duncan, a 32-year-old student of public history, had logged more than a decade exploring subways, sewers and storm drains. Last month, the two of them forged a new frontier: an extended exploration of the subterranean city, during which they lived inside the subsurface infrastructure, sleeping on the trail, as it were..."
All Things Considered (along the same vein): "... Duncan, master of the 'Undercity' (you can find his photographs at Undercity.org), had arranged a trek with Nordic explorer Erling Kagge. Kagge, who is in his late 40s, has completed the trifecta: He has summitted Everest, hiked the South Pole, and he was the first man to walk alone to the North Pole. He's killed a charging polar bear with a shot from a handgun. Looking a bit like Thor, Kagge showed up in a cherry-red sweater with a big white furry heart..."