I’ve just stumbled across this site: http://www.similarsites.com/, you can use it to view sites that have similar content to your own I used the website Digital Urban to come up with this list:
http://www.similarsites.com/sites-like/digitalurban.blogspot.com
One site I found intriguing is http://strangemaps.wordpress.com/ its a blog that introduces the reader to some weird and wonderful maps of the world.