The 'Oppidum d'Enserune' is an ancient hill-town (or
Oppidum) near the village of
Nissan-lez-Enserune,
France located between
Béziers and
Narbonne close to the
RN9 and
Canal du Midi.

The fields at Montady
Location:
The settlement was occupied without interruption between the 6th Century BC and 1st Century AD
[1], it's 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.
Below the Oppidum was the swamp of Montady, (centred on ), which is now wedge shaped fields separated by irrigation ditches that converge in the centre. In the 13th century, the swamp was drained; the ditches allowed water to flow to the center of the circular depression, from which it was conveyed through underground pipes several kilometers to the south. The drainage is still functional and remains in use.
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.
External Links
http://www.oppidumdenserune.com
References
1. http://www.culture.gouv.fr/culture/editions/daf/guid28n.htm