The
Paris Metropolitan Subway system was completed in 1900. The
individual stops were marked with Art Nouveau style entrances designed
by Hector Guimard. Although most of these have been replaced, a
few remain today. The Metro is the main way to navigate the
city; it is very easy to learn how to use it to travel from one
part of the city to another. The cost of a fare is about
$1.00 and allows you to transfer from one line to another without
an extra cost, as long as you do not exit to street
level.