The road goes parallel to the river and, on its sides, there are impressive calares with magnificent views of the saw. As you pass the village of La Toba, the river remains in the charming reservoir of Las Anchuricas, one of the most beautiful of the Sierras de Cazorla Natural Park, Segura and Las Villas, The valley offers pleasant visits around you that will allow us to know more about the Sierra de Segura, such as the village of La Toba, a place where water is the great protagonist, or the nearby populations of La Fuente del Esparto, La Peguera del Madroño or Las Gorgollitas.

On the JF-7038 road, from The Utrera Strike to Miller's Boards.

Former Xandulilla. Influent on the left bank of the Guadalquivir River. Collect the waters from the northeastern face of the Sierra Magina massif. The associated valley is given the same name. Unwind in the Guadalquivir River, in the area of Ubeda the old one. The Arab geographer Al-Zuhrí, mentions him by the name of Wadi-l-Ard, or Rio de la Tierra.

He named the former population of Xandulilla, of which there are many archaeological remains of great importance spread throughout the area. In the 17th century it was known as "Villa de Felix" with its own jurisdiction. It is a river with a normally low and variable flow rate and without regulatory structures. It is born under the Port of the Gallardos, also known in its first stretch as Rio Huelma, its main tributaries, both on the left are the Gualijar River and the Garganton River that are born in the main massif of Magina and after a very short journey they result in the Jandulilla, apart from numerous intermittent rags and ramps.

It receives from the right to the rivers Onsares, Guadalmena and Guadalén. On the left to the rivers Cotillas, Arroyo Frio, Carrizas, Morles, Trujala and the creek of Peñolite. On its way through the Sierra de Segura.

In Roman times it was called the Tago, Tagus or Tugio River, just as its birth was the Sierra de Tugia. Its Arabic name "wad al-ihmar" means "red river," which is curiously as it is called in the area, by the red color of its waters.

Location: east of the city centre, in the pedanía of Puente Honda.

Distance: 4 km.

Medium: by vehicle tourism.

Access: local road to Puente Honda.

The Mengibar Dam was an important civil work in its time, as it was among the first hydraulic power plants to be built in Spain with mobile doors. Until then, the dams were fixed and, if they exceeded their capacity, overflowed. However, in the case of Mengibar, in anticipation of possible floods, Mengemor engineers designed to install mobile doors that allow the water to be depacked in a controlled way to the river. Built from load walls, with natural stone masonry, lacquered and assembled by concrete mortar. The holes form a half-point arc with material of similar characteristics. Covered with flat ceramic tile, mounted on metal fences. It is in good conservation and is currently used to generate electrical power and inject it into the network.