The Castle of Arguijuelas de Abajo is a fortification in the municipality of Cáceres, about 14 kilometres from the city. It is very close to the Arguijuelas de Arriba Castle. It is visible from the N-630 road, also known as the "Ruta de la Plata," shortly after passing through Cáceres and heading towards Seville.

It was originally a "strong house" type structure constructed between the 15th and 16th centuries and later renovated in the 19th century. It was originally owned by Francisco de Obando "the Elder" and was associated with the development of agricultural activities from the time of its construction, but it also shared elements with other castles in the area, such as a walled enclosure and protective towers. When the first owner died, the property passed to Francisco de Obando, "el Rico," and then to Francisco de Obando Mayoralgo, the previous owner's son and the founder's grandson.

Francisco de Obando Mayoralgo initiated a series of improvements, endowing the castle with towers, machicolations, arrow slits, and sentry boxes, as well as improving and enlarging the entire interior area, such as the residential quarters. He also constructed an inner courtyard surrounded by galleries with porticoes similar to those found in the capital's palaces. One side gallery is Gothic in style but lacking in detail, whereas the other two are more detailed and rich in Renaissance sculpture.

During the reign of Obando Mayoralgo in the mid-16th century, a body must have been added on the south side that is not protected by the round cubes, with greater care and refinement shown in construction details such as the carving of the coats of arms, in a cantilevered sentry box supported on corbels and decorated with sogueado motifs. The southern section and the keep, located in the centre of the fortress, were renovated in the first third of the 17th century to serve as a residential area for the lords of the castle, who at the time were Francisco Antonio de Obando and his family. The older, north-facing main body had fallen into disuse because it was less comfortable, despite the fact that it provided the necessary security conditions.

The coats of arms of the castle's founding families, the Obando-Mogollón family, can be found throughout. Several of them, particularly those on the main façade, are of exceptional quality; the smaller ones are carved in marble, while the larger ones are carved in granite. There are semi-cylindrical machicolations and cruciform embrasures above these. A series of agricultural and livestock buildings that are still in use surround the castle. A chapel dedicated to Nuestra Seora de Gracia, which dates from the late 15th and early 16th centuries and is now located on the opposite side of the N-630 road, is located slightly separated from the main fortress.

It is currently used for a variety of hotel and catering operations.

The castle is in excellent condition, and its interior has been completely renovated. It is protected by the Generic Declaration of the Decree of 22 April 1949 and Law 16/1985 on Spanish Historical Heritage, and it is designated as a Cultural Asset.