Finestras vertical strata
The strata are ancient layers of sediment that have been consolidated as rocks. Due to tectonic plate movements, may have been moved from his position, ending found at the top of the mountains and in a very different position from the horizontal in which were deposited. One of the geological wonders Montsec Finestras rocky wall, consisting of two vertical strata lines, within which are the ruins of the castle Finestras and St. Vincent Church. This composition vertical structure is also known as the "Wall of China".