Terrouin is the river's name responsible for the capture of the Moselle 300,000 years ago. Located at Villey-Saint-Etienne, Terrouin is a Sensitive Natural Area managed by the General Council of Meurthe-et-Moselle. 30 km long, this valley is a place of a variety of natural environments: wetlands, old quarries, limestone lawns, pools, ... where each of them are a special area for the refuge of many animal and plant species.