Where's the mystery spot?

The location is someplace most computer science students see every time they come to class. I changed it a bit to make it harder to guess, but the photo should be easy to identify. I used Picnik to turn it into black and white, and then I added some fake text to the sign and then put a cartoon of a cat on the walkway.
I wanted to give it an old-fashioned magazine advertisement look - and I definitely prefer cats to dogs. That's just a personal touch to the image.
I saved it to my computer, then uploaded it to my blog.
Where do you think this is? Answer with a comment.