 The source is disputed, tradition holds that it rises at an artesian well, the Fuente de Cella, at the base of the Sierra Albarracín in Teruel province. The well is surrounded by an elliptical parapet wall built by the Italian engineer Domingo Ferrari. It is now thought that the stretch of river between Cella and Monreal del Campo is the remains of an 18th-century canal which was cut to drain the Laguna Cañizar at Villarquemado. It is currently accepted that the Jiloca raises at the Ojos (Eyes) of Monreal, 2 kilometres (1.2 mi) from the town. These are a series of ponds linked by channels. From Monreal the river flows northwards and near Luco de Jiloca (Calamocha), the Jiloca is joined by its only tributary, the Pancrudo, which rises 46 kilometres (29 mi) away in the Sierra de la Costera. From this point there is an irrigation channel which waters a small valley near Daroca.
