Bringing in the world's best and brightest innovators, the 1893 Chicago World's Fair transformed the way we look at exhibitions forever.

A ticket to the 1893 Chicago World’s Fair. Source: Blogspot
Up to the moment that the Chicago World’s Fair opened to the public on May 1, 1893, crews scrambled to replant landscaping that had been washed away in a torrential rain storm.
Puddles drowned the newly sodded lawns and some paint was still wet, but to the eyes of that day’s fairgoers, it was nothing short of a photo finish. The few remaining pieces of the Fair dazzle today’s viewers just like they did over a century ago.
Rather than a simple map, enjoy UCLA’s three-dimensional recreation of the Fair:
In the nineteenth century, cities were filthy places. Factory pollution and dust clogged the air. So when fairgoers were greeted by the glimmering Court of Honor, nicknamed the White City, it seemed like they had been transported to another world. Overseeing the Fair’s design and construction, Daniel Burnham had the huge neoclassical buildings coated in soft white paint so that they would “glow” in the sunlight.

Source: Push Carton NY
The real spectacle began after sunset. After all, it was at the White City where Nikola Tesla’s game-changing alternating current—which was chosen over Thomas Edison’s direct current to power the exposition—literally gave light to the fair at a time when lighted streets were still quite novel.

Source: Element 14
The Columbian Exposition, or the Chicago World’s Fair, is often called the Fair that Changed America: it spanned 600 acres and introduced fairgoers to wonders of electricity such as elevators and the first electric chair; products we now take for granted like the zipper, Cream of Wheat, and Cracker Jacks; and presented viewers with a look at Edison’s kinetoscope and a listen to the first voice recording. The Midway Plaisance, from which we get the term “midway,” included George G.W. Ferris’s new Wheel.

Source: Explore History