Oppidum d'Altimurium

The Oppidum d’Altimurium, also known as the Oppidum Murviel-les-Montpellier, is an ancient hill-town near the village of Murviel-lès-Montpellier, France, located between Montpellier and Béziers. It has been listed since 1896 as a monument historique by the French Ministry of Culture.

The site, which overlooks the Montpellier garrigue at 190m altitude and covers about 20 hectares, is one of the largest hill forts in the region, on par with those of Ensérune or Ambrussum.

It was founded in the 2nd century BC, and was protected by a 1st-century BC wall almost 2 km long.

Source: Wikipedia