One of the most charming places in the Pamplona Basin and in the Arga River park is the hermitage of the Trinity at Arre. It is an interesting place for several reasons. In Trinidad de Arre, centuries-old stories combine with the most beautiful Ultzama River countryside. History is still being carried every day in their backpacks by the many pilgrims who cross the beautiful medieval bridge that crosses the Arga, as this is on the St James Way. The small Holy Trinity church is also very historical, and dates from the 12th century, although since then it has undergone renovation.