El Bocal Real y el Canal Imperial de Aragón Monument · Fontellas, Ribera, Navarra Image of Fontellas, not of the place itself. The site where the Canal Imperial de Aragón begins, whose first works started in 1528 under the direction of Gil de Morlanés. The complex preserves the Palacio de Carlos V (16th century, remodeled in the 19th), the 18th-century church of San Carlos Borromeo, and the Casa de Compuertas, built in 1770 with eleven irrigation sluices. 1528; 1770 Photo: Miguel Ángel García. from Ólvega., España (CC BY 2.0) What to see and do in Fontellas