The old lagoon of Ullastret, which dried up at the end of the 19C, is now a pleasant fertile plain dotted with olive and cypress trees. It is also the site of the remains of an Iberian oppidum which recalls the occupation of the region by Greeks from Marseille. The ruins of this former stronghold are a valuable archaeological resource, as they provide a picture of the life of its inhabitants in the 4C and 3C BC. The former chapel of Sant Andreu now houses the Museu Arqueològic d'Ullastret.