http://goo.gl/maps/52jYB
It appears to be just a few spots at the moment, but apparently they're going to be expanding it in the future. There's a decent amount to play with if you move around from that one spot a bit.
Here's the blog about it. There are a couple of other areas linked as well.
http://googleblog.blogspot.com/2012/...-first_25.html