105 miles of steam pipes (NYT video) run beneath the streets of New York, delivering steam to 2,000 buildings for heating, cooling, and other purposes. The system is maintained by Con Edison (1 2 3). [more inside]
New York transit history, slides and commentary Audio-visual presentations on various aspects of New York's transit history. I particularly liked the third one, 'Subway style - Design & Architecture in the New York City Subway.'
Bridges of New York Black and white photographs by Dave Frieder.