En uno de sus valles recorrido por el río Iregua, está el Camero Nuevo, tierra de bosques, pastizales, cumbres y pequeños valles, donde se sitúan 13 pueblos con historia, tradiciones y leyendas, que siglos atrás se agruparon bajo la denominación de Hermandad de las 13 Villas.
Bridges have been very important in the past and have conditioned communications between towns. The Barruelo Bridge joins the neighbourhood of Saint Martin with that of Barruelo. It consists of two semi-circular arches of different dimensions (with a span of 26.60 m and a total length of
56 m) and its origins date back to the late XV century, although it was built in the XVI century.