An interview with Michael Cook, who explores municipal drain systems and other subterranean infrastructure.

Even people I know who self-identify as urban explorers aren‚Äôt at all that interested in undergrounding ‚Äì especially not in storm drains. A lot of them just don‚Äôt see the actual interest. It‚Äôs not a detail-rich environment. You can walk six kilometers underground through nearly featureless pipe—and there‚Äôs not something to see and photograph every five feet.

Cook has plenty of wonderful photographs and logs of his trips at Vanishing Point.