The Mystery of the Toynbee Tiles

The Mystery of the Toynbee Tiles

By iHeartPodcasts

Stuff You Should Know

Tuesday, 12 April

If you've ever been to Philadelphia then you've probably walked right by a Toynbee Tile embedded in the street. But what's the meaning on these mysterious installations, and who is doing it? Listen in to find out. See omnystudio.com/listener for privacy information.
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