Mars

There is more than one place called Mars:

France

 * Champ de Mars – A large public greenspace in Paris/7th arrondissement, upon which the Eiffel Tower stands
 * Mars, slang for Marseille, as popularised by the French hip hop group IAM

Italy

 * Campus Martius, Rome – Erstwhile place of assembly and military exercise named for the Roman god of war today known in Italian as Campo Marzio; all other "fields of mars" are named for this one.

United States of America

 * Mars (Pennsylvania) – A small town in Pennsylvania.