This medieval village dates back to the days of the Romans and which in the 9th century was one of a line of fortresses built on the border of the Castilian county. In the 12th century King Alphonse I of Aragón granted it a series of privileges, converting it into an important medieval town. Today it has a population of 1,910.
- Church of Santa María. This former Church of La Virgen de la Capilla was rebuilt in the 16th century. The interior houses a number of interesting tombs and a chapel to Saint James with a 16th century altarpiece.

- Church of San Pedro (17th century).

- Shrine of Nuestra Señora de Belén. A former pilgrims’ hospital, it was rebuilt in the 18th century.

- Convent of Nuestra Señora de la Bretonera (16th century). Run by nuns of the Order of St Clare.

- Castle. Remains of the important medieval fortress that marked the border with Navarra.

-Caves of San Valentín and Santa Pía. Remains of the caves in which Saint Caprasius was said to have retreated.

- Jewish Quarter: Remains of the Jewish Quarter which historians believe was situated in the Corro District can still be seen today.