Ordesa and Monte Perdido National Park.

Spain’s oldest protected area is defined by the massive limestone massif of Monte Perdido and the dramatic glacial architecture of the Ordesa Valley. This isn't a typical rolling mountain range; the terrain is dominated by steep, 800-meter vertical cliffs, karst formations, and the iconic Añisclo Canyon. Hikers of all skill levels navigate a landscape that shifts from dense forests and high-altitude meadows to landmark waterfalls like the 50-meter-high Cola de Caballo. While the birdlife is prolific—keep an eye out for bearded vultures and golden eagles—the real draw is the sheer geological scale. Whether you’re trekking the airy Faja de las Flores path or visiting the 11th-century Ermita de San Úrbez, the park feels remarkably ancient and perfectly preserved.