The small city of Lugo in northern Spain has a special secret.

It is the *only* place in the world to have a complete set of intact Roman walls. They were built 2,000 years ago and surround the entire old town.

But how did they survive? That’s where it gets interesting… pic.twitter.com/sA8gszMV6R

— The Cultural Tutor (@culturaltutor) November 22, 2022