Transparent Concrete Walls
Litracon is a see-through concrete developed by Hungarian architect Aron Losonczi. Filled with optical fibers that run from one end of a poured piece of concrete to the other, these prefabricated blocks and panels effectively transmit light from one side to the other.
The material can be used for artistic purposes, or in commercial or residential construction projects, where experts predict it could reduce heat loss in buildings. Needless to say, this stuff turns the traditional concept of cold, hard, gray concrete on its side.