Inspired by the White City and Midway Plaisance sections of the World's Columbian Exhibition of 1893, the parks started gaining in popularity in the last few years of the 19th century.
The enormously successful 1893 World's Columbian Exposition in Chicago attracted 26 million visitors and featured a section that is now commonly considered the first amusement park: a midway (the mile-long Midway Plaisance), the world's first Ferris wheel (constructed by George Washington Gale Ferris Jr.), a forerunner of the modern roller coaster (Thomas Rankin's Snow and Ice Railway, later moved to Coney Island),[1] lighting and attractions powered by alternating current (Sebastian Ziani de Ferranti had completed the first power plant with AC power in London just the year before), and the debut of several kinds of foods in the United States, including hamburgers, shredded wheat, Cracker Jack, Juicy Fruit chewing gum, and pancakes made using Aunt Jemima pancake mix.
[2] Ragtime composed and performed by Scott Joplin exposed millions of people to a new form of music and instantly became a staple for fairs and carnivals.
While White City gave the park its visual identity, the throngs who attended the Columbian Exposition tended to collect at the Midway Plaisance (and Buffalo Bill's Wild West Show, which set up shop just outside the park grounds after the fair's founders rejected Buffalo Bill Cody's attempt to become an official Columbian Exhibition exhibitor).
[1] The World's Fair was destined to be remembered primarily for two ironic visions, that of the crowds at the Midway Plaisance (which essentially was the first modern amusement park with its entertainment, including exhibitions of boxer John L. Sullivan and exotic dancer Little Egypt, its games and its rides) and the architecture of the (far less popular) White City.
[1] Railway companies, noticing the popularity of Midway Plaisance of the Columbian Exposition and the lack of railroad ridership on the weekends, constructed trolley parks as an effort to improve their bottom line.
Although most White City parks were out of business by the end of the United States involvement in World War I, a few survived into the middle third of the 20th century.