The Urdaibai Biosphere Reserve is located in the Basque Country of Spain, encompassing a diverse range of ecosystems, including wetlands, forests, and coastal areas. Established in 1984, it covers approximately 22,000 hectares and is recognized for its rich biodiversity, including various bird species and unique plant life. This reserve is also home to the Urdaibai estuary, which plays a crucial role in the region's ecology. The area is a UNESCO Biosphere Reserve, promoting sustainable development while preserving its natural and cultural heritage. Visitors can enjoy activities like hiking, birdwatching, and exploring traditional Basque villages.