CDPB CHALLENGE: Toynbee Tiles

Attention amateur detectives, conspiracy theorists and devotees of the unknown:

I was crossing the intersection of 8th and Market Streets in downtown St. Louis a few days ago, a place I've walked thousands of times, when my eye fell on a spot of color in the street. What's this? It was made of some kind of tile embedded in the pavement. Toynbee...Kubrick...Jupiter?

No idea what this meant so it was Google to the rescue. It turns out to be a bizarre international phenomenon, the subject of much study and speculation. These mysterious tiles have a site that catalogs known locations and provides other references. Many have been destroyed in the course of routine road maintenance. There are reports that some cities, such as New York and Chicago, have deliberately attempted to erradicate them. By far the greatest number are found in Philadelphia. Unfortunately, there is no CDPB in Philadelphia. Now, if someone was waiting for a reason...

The game's afoot, Watson! The other two reported St. Louis locations are downtown and I will attempt to photograph them at once. CDPBers of the World, are there one or more Toynbee Tiles in your city? Let's see them.

TOMORROW: Will Strangetastes Find Other STL Tiles?