Les Vans - Naves - Brahic Les Vans > Naves > Serre de Barre > Brahic > Les Vans. En montant sur les contreforts du Serre de Barre vous découvrirez les villages de Naves et Brahic. Remarquez trois milieux bien différents: le calcaire blanc, avec les oliviers, le thym et les genévriers, la marne verdâtre et très friable (cirques en contrebas) et le schiste sombre où poussent pins et châtaigniers. Cette diversité géologique sur un périmètre aussi restreint est remarquable. 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