Western Europe’s finest surviving Roman walls completely surround the town of Lugo. Set beside the Minho river in Galicia, northwest Spain, Lugo was important to the Romans because of its thermal waters and the vast deposits of gold that were found nearby. Walk around the top of the walls, which are 32-ft (10-m) high, passing its many gateways and towers on the way.
The Roman walls of Lugo were constructed in the 3rd century and are still largely intact, stretching over 2 kilometers around the historic centre of Lugo in Galicia. The fortifications were added to UNESCO’s World Heritage List in late 2000 and are a popular tourist attraction. Wikipedia