I get a big kick out of antiquated technology, ruins, grandiose abandoned projects, and secret places. So I wish I had been in New York yesterday for the 100th Anniversary of the city's subway system. For the centennial, Mayor Bloomberg held at a ceremony at the glorious but abandoned City Hall Station.
Here's what it looked like as of yesterday:

If you like that photo, there are more here, and you can also take a gander at Joseph Brennan's elegant site telling the story of Broadway's secret train, the failed precursor to the 1904 subway system. Having read about New York's extensive 19th-century pneumatic tube network in The Victorian Internet, I loved this chapter, and especially this drawing of the Pneumatic Dispatch:





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