Did you know? In Viry-Chatillon, Essonne, you'll find one of the few remains of a nymphaeum waiting to be discovered. This mysterious shell grotto awaits you in the heart of the Piedefer estate. So, are you ready to visit this unusual Île-de-France heritage site?
The Journées du Patrimoine (Heritage Days) make a comeback on the weekend of September 20 and 21, 2025 in Paris and the Ile-de-France region. This is your chance to explore the Nymphée Nymphée, a mysterious shell-covered cave in Viry-Châtillon, Essonne. What an unusual discovery!
