Twice every year, the setting sun lights up with the east-west grid of manhattan. It's called Manhattanhenge. Read about it in a trusty source, here.
Last night I went out and captured a few photos of this occurrence. I wouldn't say I did the best photography job because with the sun shining it was hard to tell on my camera. Plus I had to stand in the middle of the street without getting hit to get the shots. It was a beautiful site despite what the photos show.