I'm bored and I haven't seen this on another forum before (just xkcd), so a kinda sorta forum game it is. A user posts a link to a Wikipedia article. Second user looks at that article, clicks a link to another Wikipedia article, and posts that link. Try not to bounce links back and forth between the same two articles (like person A links article A, person B links article B, person A links article A because B included a link back), and I'm sure something can happen if we get stuck. I want to see how it works out, and we might learn something (if only that Wiki has articles for everything). :)
For starters...the Tacoma Narrows bridge.