I developed a thing about photographing these tanks on top of many buildings in Manhattan, even in the central business district. We don't have them in Melbourne so they struck me as a little out of place - a rural sight in a big city. I don't know if they're still actually in use.
(with added faded sign goodness)
Columbus Circle
Bleeker Street
So common are the tanks, I took photos of them without even trying:
Union Square
