Oppidum d'Ensurune
The Oppidum d'Ensérune is an ancient hill-town (or oppidum) near the village of Nissan-lez-EnséruneFrance, located between Béziers and Narbonne close to the D609 (formerly RN9) and Canal du Midi.
The settlement was occupied without interruption between the 6th century BC and 1st century AD,[1] its location being chosen presumably because it was a hill with good views over the coastal plain, being close to the Roman road Via Domitia, the Montady lake, and fertile agricultural land below.
There is a museum on the site which offers a display of some of the finds on the site, as well as giving more information about the fort and the field system.

More info at: http://en.wikipedia.org/wiki/Oppidum_d%27Ens%C3%A9rune

Oppidum d'Ensurune