The Biosphere reserve and the Tajo Internacional Nature Reserve are located in the western part of the Iberian Peninsula right on the border which joins Extremadura and Portugal. Here the River Tajo (“cut”) lives up to its name and splits its banks into two hills, valleys, and numerous rocky formations to give them a unique ecosystem, numerous prehistoric relics, and a great variety of minerals.
Geology is the natural science of the study of the earth and its relationship with the environment and is another attraction of this territory, which has had a turbulent history from a geological point of view and has left very interesting remains.
Tajo Internacional is an area of low altitude with steep relief and with the River Tajo as the backbone of the territory. Its tributaries, the Sever, Pónsul, Aravir, and Erjas, border the peneplain and have shaped a unique geological space.