12. The Alhambra, Spain
After the fall of Granada, the Alhambra suffered years of neglect and vandalism, putting its exquisite Moorish architecture at great risk. By the 19th century, much of this palace complex was crumbling. Restoration efforts—sparked by renewed appreciation for its beauty—breathed new life into the Alhambra, saving it from near ruin. Delve into the palace’s revival at Smithsonian Magazine.
