The town hall of Ecommoy offers a guided tour of the cellars of Loup Pendu, a former mushroom farm on Saturday, September 16 at 10 am and 2:30 pm and Sunday, September 17 at the same times. They will be guided by speleologist M. Genervin and will be conducted in groups of 15 people. They will last 1 hour. It is recommended to bring walking shoes and a small sweater. A helmet with a headlamp will be provided to each visitor. The route will be marked and the place identified. Registration required at the Ecommoy town hall (02 43 42 10 14) or at the Tourist Information Point (02 43 47 02 20).