Métropolitain

Châtelet-Les Halles has 5 Métro lines and 3 commuter rail lines, making it the world's largest underground station.  These shots were taken by Le Cercle Rouge (click here) and are part of a very colourful set showing the metro at night, not that you'd know. The various colours not only distinguish each tunnel, but create a slightly hypnotic feel, pulling your eye towards the end.