Here's a good piece of weirdness for the weekend. This site describes "Toynbee tiles," sidewalk or street tiles placed by parties unknown and bearing bizarre inscriptions apparently having to do with the historian Arnold Toynbee or the film "2001." The majority are in Philadelphia, Pittsburgh, and New York, but the site lists three in Detroit. Are they still there [[of course I will go and look)? Are there others? Does anyone have any knowledge of them?

http://web.archive.org/web/200705011...w.toynbee.net/