The Bidassoa River is a river located in the Basque Country, forming part of the border between France and Spain. It flows into the Bay of Biscay and is approximately 45 kilometers long. The river is significant for its historical role in the region and serves as a natural boundary between the two countries. The Bidassoa River is also known for its picturesque landscapes and biodiversity. It is home to various species of fish and birds, making it a popular spot for nature enthusiasts and anglers. The river's banks are lined with charming towns, including Hendaye in France and Irun in Spain, which attract visitors year-round.