13. Taj Mahal, India
The shimmering white marble of the Taj Mahal was once dulled by air pollution and neglect, threatening to erode its enchanting beauty. Recognizing the danger, Indian authorities and conservationists launched ongoing cleaning and preservation projects, using both ancient and modern techniques to safeguard the mausoleum’s splendor. Thanks to these efforts, the Taj Mahal continues to awe millions. Read more about its preservation at BBC.
