How to on making “Toynbee Tile Mosaics”, unique asphalt tile installations found all over North and South America. “This is a method for making colorful, permanent mosaic installations in asphalt roads and lots. Like glass, asphalt appears to be a solid but is actually a liquid. This means that a design affixed to it with more asphalt will eventually settle in and become a part of it. We owe our awareness of this technique to a nameless mystic we have never encountered in person.” Link.