The Sierra de la Cabrera Baja, forms a natural boundary with León Province in the north, Sierra Segundera with Galicia in the west, and Sierra de la Culebra and Sierra de la Gamoneda with the Bragança District of Portugal in the south and southwest.
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The Sanabria comarca is one of the few areas of Western Europe with a sizeable population of wild wolves, which live in the Sierra de la Culebra mountain range.
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