The glittering Crystal Palace was the centerpiece of the first modern World's Fair this city's 1851 Great Exhibition

This was the main attraction of the 1889 Paris Exposition; it also served as the entrance

The 1893 Chicago World's Fair introduced this word for a central avenue of exhibits & amusements

A 1939 New York World's Fair diorama predicting the look of the city in 1960 was called this later a long-running animated TV series

Exhibits at Osaka's 1970 World Expo included one of these microscopes capable of magnifying objects 500000 times