Hotel & Spa Monasterio de Piedra is set within a restored 12th-century Cistercian monastery, deep inside a privately protected natural park in Aragón. Surrounded by woodland, limestone cliffs and a network of waterfalls shaped by the Piedra River, the setting feels both contained and expansive. Historic cloisters and vaulted interiors now house the hotel, but it’s the landscape that defines the stay, with walking paths leading directly from the monastery into caves, cascades and quiet mineral pools.