Hop on a quad bike and head for one of Huesca’s most stunning natural landmarks: the imposing Muralla de Finestres. On this 3-hour guided tour, setting off from Estopiñán del Castillo, you’ll follow mountain trails until you come face to face with this colossal limestone ridge overlooking the Canelles Reservoir. The expedition is rounded off with a walk across the Penavera Bridge, a stroll through the uninhabited village of Finestres, and a light snack.