Although the Eiffel Tower was built over a century ago, only about two dozen structures in the world are taller than it today. Most of them are in the Far East, which is currently enjoying a fad for building tall skyscrapers similar to that of the U.S. in decades past. One of the things that makes the Eiffel Tower unique, however, is that it's an open latticework of metal, not an enclosed building. For this reason, it's a lot more likely to trigger a fear of heights than most other, taller buildings.