The Paris- Charles de Gaulle Airport is an array of terminals with a diverse architecture. If the British high tech tradition is based on metal structures, the tradition in France, and specifically in this terminal, is rather one of concrete and mass, always with striking technical solutions.
Terminal 1 is the clearest example. It shows architecture akin to that often practiced in the 1970s by French architects as Claude Parent, and images of an alternative future. Some parts of the building have not aged well, and the itineraries for travelers are not always clear, but the building as a whole is interesting.