The best preserved fortress wall in Europe is located in the North-West of Spain in the city of Lugo, the main city of the province of the same name in Galicia. The length of the wall is 2 kilometers; it was erected by the Romans in the 1st century. The height reaches 10 meters, the width reaches 6. On the top, you can bypass the old city covered by it around. Through the gates of Santiago, punched in the wall, you can get to the cathedral, the construction of which began in the distant 1129, from the same gate you can go upstairs.→