The Sierra de la Culebra is a mountain range located in the northwest of Spain, primarily within the province of Zamora. It is part of the larger Iberian System and is known for its rugged terrain and diverse ecosystems. The area is characterized by its unique flora and fauna, including various species of birds and mammals. This region is also recognized for its natural beauty and outdoor recreational opportunities, such as hiking and wildlife observation. The Sierra de la Culebra is home to the Wolf Nature Reserve, which aims to protect the population of Iberian wolves and their habitat.