Images and content are retrieved algorithmically from various places (Flickr, Wikipedia, etc.). Planning to monetize later by letting people purchase specific categories (like "romantic getaways"). Right now, all categories are free.
I'm using the Flickr API myself for photo annotations - be careful to honor the licensing of those images. Quite a few are copyrighted, e.g. those in the Josha Tree section. Linking back is not enough, explicit permission is requried.