Nothing is more iconic of Paris than its antique Metro signs, which are the inspiration for this typeface. The signs vary from station to station, some featuring plain block capitals, others the most exquisite Art Nouveau. This example falls somewhere in between. Unlike the London Underground, no matching font was designed to match the original signage of the Metro, so this is largely a work of extrapolation and imagination. It remains true to the spirit of the original however and should inject a strong gallic flavour into any design or publishing project.
To recreate the Metro effect in Photoshop, set your text white on red, then go to Layer Style> Inner Shadow. Or with Paris Metro Reverse set your text red on white, then go to Layer Style> Drop Shadow.