Colosseum Is in Danger of Disappearing + 7 Vanishing Landmarks

If you have plans to visit some of the most famous landmarks in the world in your lifetime, you might want to hurry up. That's because they have a chance of disappearing in the foreseeable future. The Eiffel Tower was only meant to stand for 20 years, so rust is taking over it. Due to yearly exposure to harsh weather, the Colosseum is also getting weaker. As for the Taj Mahal, it might eventually get destroyed by the growing pollution.