The grand Roman walls encircling old Lugo are considered the best preserved of their kind in the world and are the number-one reason visitors land here. Within the fortress is a beautifully preserved web of streets and squares, most of them traffic-free and ideal for strolling, with plenty of interesting things to see (nearly all free) and a terrific tapas-bar scene. Lucus Augusti was a major town of Roman Gallaecia and modern Lugo is a quiet but engaging city, with a good number of other Roman remains besides the walls.