The castle-palace of Biniés rises above a slope that descends to the Veral river on the route from Berdún to Ansó. Its ancient origins can be traced back to before 893 AD as it is mentioned in the Cartulary of San Juan de la Peña, a comprehensive record of the County of Aragón. The building that has survived to the present day can be dated to between the 14th and 16th centuries, when a more courtly palace was built on an earlier castle and the battlements and other military features were eliminated. The building conserves several Late Gothic or Renaissance features such as the structure of the floors, the windows, the doors and the remains of beams and staircases. The castle-palace of Biniés was partly devastated by a fire in 1928 and seventy years later, between 1996 and 1998 it was sensitively and faithfully restored.

The castle is quadrangular in shape with a large central patio (once covered by a gabled roof) and four impressive towers, one of which is in a state of ruin. Worth noting is the arch of the main doorway and a window in Gothic style. There is a chapel at the base of the south east tower which is decorated with frescoes and which, according to an inscription, dates from 1583. Before its restoration, the towers had been dismantelled to give the castle a more courtly air and minimize its military character. A stone, found during the restoration, dates this conversion of the towers to the year 1550.

It is therefore clear that the privately owned castle-palace of Biniés as seen now was used as a palace and had a courtly function from the 16th century onwards and was built on the ruins of a previous castle. It is almost impossible to guess its appearance and style prior to the 14th century. Its most famous owners over the centuries were Fortun de Gurrea in the 12th century, Jimeno de Arba in the 14th century and the Urriés family of Ayerbe, at the beginning of the 17th century.