The Four Most Prolific Things in NYC

Without further ado, the four most prolific things in New York City are:

1. Cockroaches
2. Rats
3. People

...

4. Water towers

Didn't see that coming, did you? I noticed this while eating my 3pm orange today. I took a picture from the roof of the building I work in. I've circled all of the water towers that I noticed. Click for a (much) larger picture.