There are some buildings in Cuenca that were built on the edge of an imposing cliff. Even some of them are practically hanging: they are known as Hanging houses. This has made it a remarkably interesting city for tourists. You have all the information in: «Ranking of the 20 most beautiful cities in Spain: the best photos«.
You have all the information in: "Ranking of the 20 most beautiful cities in Spain: the best photos".