Odiel is a river located in the southern part of Spain, specifically in the province of Huelva. It flows through the Sierra de Aracena and eventually empties into the Gulf of Cádiz. The river is approximately 100 kilometers long and is known for its scenic beauty and diverse ecosystems. The Odiel River is significant for its role in the local environment and economy. It supports various wildlife habitats and is a source of water for agriculture in the region. Additionally, the river is part of the Odiel Marshes Natural Area, which is recognized for its rich biodiversity and importance for bird migration.