9 tourist attractions that are dying

(CNN)The dilemma is sometimes likened to a double-edged sword.

Historical and natural sites of extraordinary beauty often draw large numbers of visitors to the countries that host them, providing a healthy tourism revenue.
    However, those same crowds often have a detrimental effect on the places they visit, sometimes leading to significant damage, which has in recent years sparked a debate whether tourist numbers should be capped.
      "Sites all over the world are under threat at any given moment. Apart from the monuments and ancient cities in the Middle East, I would say hist