Paris Métro
The Paris Métro or Métropolitain () is a rapid transit system in Paris, France.  The network is mostly underground. It has 19 lines, which together are 225.1 km (139.9 mi) long. There are 304 stations. 17 of these lines are owned by RATP, the state-owned public transport operator in Île-de-France, and 2 by Paris Airport.