Located near the village of Tebra, at the Tomiño area, the Archaeological Eco Park Monte Tetón, contains some of the most important ancient petroglyphs present in Europe. In this particular case, these prehistoric rock carvings are gathered in two main sites in the park, and they show a large collection of different carving designs, including concave-shape marks, square designs, animal and human images, and the most important of all of them, the amazing combinations of concentric circular petroglyphs. Those labeled as "Group 3", with 18 concentric rings and a maximum diameter of 350 cm, are considered to be some of the biggest petroglyphs of that kind in Europe.