Le Grand Manger offers a commented walk at 2 p.m. A 4.6 km route to discover 4.6 billion years of the Earth's history and the birth of Humanity. Provide good shoes, water and warm clothes (2h30). From 14 years old. Free price. 4.30 p.m. autumn snack (€7). 6 p.m. Gesticulated conference “Towards the Senate...And beyond! » by Aurélien Vernet (duration: 1h40, free participation).