Ray continues his exploration of the geography, flora and fauna of France by heading to the Ardeche, where miles of gorges and limestone cliffs characterise this part of the Auvergne-Rhone-Alpes region. He visits a cave with a long history and is given special permission to abseil in through the original sky-facing entrance, finding an array of stalactites and stalagmites inside. He then canoes down the Ardeche river and meets wildlife ranger Olivier, who teaches him some of the traditional uses of local plants.