Sala has an interesting application (Java Applet) that will display the tags of a specific  Website as a graph or image.  The images are generated from the tags for a specific web page. More...

Shakespeare may have thought All the world's a stage, but Julian Beever thinks all the world (or at least the sidewalk) is his canvas. Mr. Beever has some interesting artwork he calls pavement drawings.  I don't think he actually digs up the sidewalk (pavement if you live in the UK), but it sure looks like it.

Visit Julian Beever's site to take a look at his portfolio of interesting chalk drawings.

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NASA has a list of several (over 100,000) visible earth pictures at NASA Images. Many of these images are quite stunning as is this one titled The Blue Marble.