The Sierra de Urbasa is a mountain range located in northern Spain, specifically in the province of Navarre. It is part of the larger Pirinéos mountain system and is known for its stunning limestone cliffs and diverse ecosystems. The area is rich in flora and fauna, making it a popular destination for nature lovers and hikers. The Sierra de Urbasa is also home to the Urbasa-Andía Natural Park, which offers various trails and viewpoints. Visitors can explore its unique landscapes, including lush forests, meadows, and impressive rock formations, while enjoying panoramic views of the surrounding countryside.