It's amazing to me that the World's Fair gave us so many iconic and wonderful structures, all of which are probably too impractical to build otherwise: the Eiff

It's amazing to me that the World's Fair gave us so many iconic and wonderful structures, all of which are probably too impractical to build otherwise: the Eiffel Tower, Space Needle, Unisphere, Palace of Fine Arts, etc. It's unrealistic, but it's worth having a new world's fair just for an excuse to build another one of these!