A natural tunnel made by erosion right through the rocks. This attractive natural arch is located on the side of Ravin du Valadas (Valadas gulch) above Tarn river near the village of La Cesse in Aveyron department of France. Grand Tunnel has a measured wide of 14.5 meters and a height of 7.0 meters. IGN topogrphic map Top 25 number 2641 west Millau pleat A3.
