Flickr is a service that lets you upload photos to share with the world. You can also browse other peoples’ albums. http://www.flickr.com/

Photos can have “tags” associated with them, which are like keywords denoting their subject. This lets you view everyone’s photos by topic: http://www.flickr.com/photos/tags/

I’ve found that these tags tend to have the best-quality photos associated with them: http://www.flickr.com/photos/tags/sunset/ http://www.flickr.com/photos/tags/nature/ http://www.flickr.com/photos/tags/architecture/ http://www.flickr.com/photos/tags/autumn/ http://www.flickr.com/photos/tags/flowers/ http://www.flickr.com/photos/tags/macro/ http://www.flickr.com/photos/tags/reflection/ http://www.flickr.com/photos/tags/trees/

Here’s the URL of an RSS feed that combines all these tags (thumbnails will be embedded in the summaries): http://www.flickr.com/services/feeds/photos_public.gne?tags=sunset,nature,architecture,autumn,flowers,macro,reflection,trees&format=rss_200