Using different remote sensing techniques and open access datasets (mainly aerial photography, satellite imagery, and airborne LiDAR), an international team of archaeologists has discovered 66 Roman military sites of different sizes used for training and shelter in the northern fringe of the River Duero basin in León, Palencia, Burgos and Cantabria provinces of Spain.
The Roman military camp of Tortolondro in Spain. Image credit: Blanco
et al., doi: 10.3390/geosciences10120485.
The newly-discovered Roman military camps date to the Late Republic or Early Imperial eras.
They are located at the foothills of the Cantabrian Mountains, where the conflict between Romans and natives was focused at the end of the 1st century BCE.