This feed is grabbed from http://api.flickr.com/services/feeds/geo/ the new flickr feed of recently uploaded geotagged images. You can view the feed in google earth if you change the render variable to kml.
This pipe is a clone of "My flickr contacts faves" by Alto Maltes (more info at http://flickr.com/groups/flickrhacks/discuss/72157600044080706/)
In this pipe the thumbnails are presented in their actual aspect ratio rather than square format.