The area where Uncastillo is located has been occupied since VI century by Indo-European emigrants. In Roman times, this area started to become important due to its excellent conditions for the cultivation of cereal crops. After the beginning of the Reconquest of Spain, the town became an important Christian fortress. At that time, the town received its actual name (Unum Castrum Uncastillo).

In spite of Uncastillo’s particularly dry surroundings, there is a rich and varied flora and fauna. Its strategic location in the district of Las Cinco Villas, one of the most important and well-known historical areas of Aragon, offers visitors many artistic and rural possibilities.