The castle on the border with Aragón Monument · Embid, Señorío de Molina, Guadalajara Image of Embid, not of the place itself. The frontier with Aragon bristled with fortresses during the War of the Two Peters, which set Pedro I of Castile and Pedro IV of Aragon against each other between 1356 and 1369. Of this town's, there remain the walls of the towers looking out over the plain. 1356-1369 Photo: Stuart Smith. (CC BY-SA 2.0) What to see and do in Embid