It appears that Tom Scott is back from Lake Constance and now he's on the streets of London. The streets themselves have a story that you may not know, unless you are blind. If you know what to look for, the texture underneath your feet can tell you a lot about where you are and how to get around. A totally neat system! -via Viral Viral Videos
Those aren't just in England. Many major cities in the US have them, including San Diego, San Francisco and New York.
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