Today, Thursday, July 12, at 8:25 P.M. EDT is one of two days when the sunset is exactly aligned with the grid of streets in Manhattan. Your own little urban Stonehenge.
I expect Druids to be gathering to gaze at the sunset down 34th Street.
For best effect, position yourself as far east in Manhattan as possible. But ensure that when you look west across the avenues you can still see New Jersey. Clear cross streets include 14th, 23rd, 34th. 42nd, 57th, and several streets adjacent to them. The Empire State building and the Chrysler building render 34th street and 42nd streets especially striking vistas.