Head over to Websites As Graphs and punch in any website. Watch as the script forms a graph of the site. The result? You'll get a graph of the site, just like the one of The Smarmy Carny pictured here. More accurately, the graph is of that webpage not the entire site. Based on the definitions for the colors, it is less like a network map and more like a graph of the webpage layout. Each dot refers to a different tag on the page, including links, images, tables, quotes, etc.
The bottom of the page informs you about what type of tag each color refers to, but I wish I could hover over the dots and see exactly what I'm looking at. I'd like to be able to say, "That dot right there is the picture about Websites As Graphs," but I can't.
Many people have posted their pictures on Flickr under the tag websitesasgraphs. In fact, the site claims that this was the #1 tag on Flickr over the last full week of May. Good times.