These messages are painted on rectangular linoleum tiles and embedded into the asphalt of the streets.
Other tiles carry political statements and tirades against society and culture, spelled out in a similar cryptic tone.
Map showing the location of Toynbee Tiles.
The tiles are deployed by an ingenious method.
They are wrapped in tar paper and placed on a busy street.
As cars drive over the tiles, they are pressed into the road surface.
Eventually, the tar paper wears away, exposing the message.
Many tiles have since been destroyed in the course of regular road maintenance.
Toynbee Tiles have achieved a cult status.