There's a pretty great photo op of the Empire State Building at 33rd & Park - at least, when New York isn't inundated with snow like it was today.
If you'd like to recreate the above angle, it should be pretty simple...
Someone marked the spot for you!
Nice. Apparently, the same stencil can be found outside the planetarium at the Museum of Natural History, resulting in this shot (good eye, dsottavio! Check out his Flickr page for some great pictures):
There's gotta be at least a dozen more out there somewhere near major landmarks...Any sightings?