You might already know that I have a soft spot for pictures of torn and decaying posters and the like, so it’ll come as no surprise to anyone that this is what I’d define as “cool”.
For more pics that could be tagged with that word, have a look at Chuck Anderson’s No Pattern. I like the ‘Godlike’ & ‘Places…’ pictures in particular.
(Picture “he put fish photos on raisin boxes and the world embraced his genius” taken by enyahs on March 2, 2007.)