FR-41. This natural arch is visible from Le Belvedere, an spectacular overlook on the Dourbie Canyon. Le Belvedere is located on the red marked loop trail on the Chaos de Montpellier-le-Vieux. The opening can be reach by a very primitive trail. The main thing is to know where this trail begins in the jumble vegetation.IGN topographic map issue 2641 west Millau (pleat B4).