Piedra (Spain) - Wikipedia

The Piedra (Spanish: Río Piedra) is a river in the Iberian System area, Spain. It is a tributary of the river Jalón. The waters have a high concentration of calcium ...

Monasterio de Piedra - Wikipedia

Monasterio de Piedra (Stone Monastery) is a monastery, hotel and park complex in the Iberian System mountain ranges, near Nuévalos, province of Zaragoza, Aragon, Spain.