I’m really unsure about whether I’ve ever posted this before, but this Flickr/Twitter map of Atlanta is still pretty cool. Tweets are in blue, Flickr posts are in orange and where both occur are white. Note the distinct patterns for Hartsfield-Jackson airport, Stone Mountain, Piedmont Park and downtown Decatur.
These maps are courtesy of Eric Fischer, who posted a bunch of these maps for many of the worlds major cities on Flickr.
The North America map is pretty interesting as well. Lots to say east of the Mississippi and lots more to see west of it.