A World’s Fair was never just another festival. These huge events gave countries and cities a chance to share their cultures and show millions of visitors what the future might look like. However, many of their most attractive structures were meant to last only a few months. In many cases, tearing them down almost seemed like a waste; some buildings needed to stay for future generations. These 10 landmarks escaped the fate of being dismantled and found a whole new purpose after the fairs ended, becoming lasting symbols of their cities.