Champ de Mars–Tour Eiffel (French pronunciation: [ʃɑ̃ də maʁs tuʁ ɛfɛl]) is a railway station on the RER C line of the Paris Region's express suburban rail system, the Réseau Express Régional (RER). It is in the 7th arrondissement of Paris, close to the Champ de Mars and Eiffel Tower, after which it is named. The site has accommodated a total of five stations.

From Wikipedia