The Marais d'Orx nature reserve in Aquitaine, France, spans 1,000 hectares and has transitioned from drained agricultural land to a thriving wetland. Managed by Fabienne Puyo and Paul Lesclaux, the reserve focuses on reintroducing ospreys through the Balbuzard Plan, which has successfully increased their population. The reserve also emphasizes biodiversity and public education, having invested in infrastructure to enhance visitor experience and awareness of nature's value.