Staged to celebrate the completion of the Panama Canal, and drawing over 19 million visitors in only nine months, the Pan-Pacific International Expo rose like a literal jewel from the ashes of San Francisco's 1906 Earthquake and Fire.
A Century of Progress International Exposition was held in Chicago, Illinois from 1933 to 1934 to celebrate the city's centennial. The theme of the fair was technological innovation. Its motto was "Science Finds, Industry Applies, Man Conforms".
The 1939-40 New York World's Fair, located on the current site of Flushing Meadows-Corona Park, was one of the largest world's fairs of all time. The fair ran for two seasons and over 44 million people attended.
The Golden Gate International Exposition was held in San Francisco, California to celebrate the opening of the San Francisco-Oakland Bay Bridge and the Golden Gate Bridge. The exposition's first season ran from February 18, 1939 through October 29, 1939 and its second season was from May 25, 1940 through September 29, 1940.
The 1964/1965 New York World’s Fair, located on the current site of Flushing Meadows-Corona Park. The fair ran for two seasons and took place without sanctioning from the Bureau of International Expositions.
Expo 67 was held in Montreal, Quebec, Canada from April 27 to October 29, 1967. It was considered to be the most successful World's Fair of the 20th century, with over 50 million visitors and 62 nations participating.
Lines are not going to be an issue for the most part, other than a very few exceptions. The solar ride on the 6th floor of the sphere is about a 30 minute wait. The Korean pavilion had a wait too .. maybe around that amount of time. Other than that most places you are able to just walk in, or within 5 to 10 minutes tops. Security lines at the entrance of the expo are quick too .. over in a few minutes. The lines are not insane like at the Shanghai Expo (where some people had to wait 4 hours to get in the China pavilion, that is if you are lucky enough to get a ticket for it first thing in the morning .. compare that with only 5 minutes to get in the KZ pavilion at the Expo; or the 9 hour line for the Saudi Arabia pavilion at the Shanghai Expo; or the 8 hour aquarium line at the Yeosu Expo).
way of the future: I would increase the number of days from 3 to 4, rather than downgrade it from 3 to 2. Keep it at 3 .. don't lower it, otherwise you will miss out on some good stuff.
I will answer my one question now that I have been to Astana. I did not see even one dog, stray or leashed while I was in Astana during that entire week. I saw one stray cat under a bridge. The only time I saw a dog was the K9 units the military police had on a leash at the Expo grounds. The streets are safe. This ain't no Thailand or Taiwan.