Pictured is an aerial nighttime view of the grounds at the World's Fair, as seen from the New York State Tower in New York City in Sept. 1964.

A view of a helicopter in flight is pictured above the World's Fair site in New York City in 1964.

Guests are pictured walking at the World's Fair in New York City in 1964.

American urban planner Robert Moses, president of the World's Fair, stands in front of the Unisphere at the World's Fair in New York City in 1964.

The exterior of the Thailand pavilion is pictured at the World's Fair in New York City in 1964.

Dinoland is pictured at the World's Fair in New York City in 1964.

People ride a train through the "it's a small world" pavilion, presented by Pepsi-Cola, at the World's Fair in New York City in 1964.

The United States Rubber Company's 80-foot tall U.S. Royal Tire Ride is pictured at the World's Fair in New York City in 1964.

Nina Simone performs at the World's Fair Singer Bowl in New York City on October 18, 1964.

Spanish Flamenco dancers perform in front of the Unisphere steel globe at the World's Fair in New York City on May 25, 1964.

Ann Zaccone, right, was a ticket taker at the 1964 World's Fair, the booth seen in the photo is the ticket booth where she worked. Zaccone said the highlights were when celebrities, like Lucille Ball and Paul Newman, came to buy tickets. She also said the visit from Pope Paul VI was very exciting, and he "made the whole place feel more holy."

Capturing the happy, peaceful spirit of children everywhere, "it's a small world" debuted at the 1964 World's Fair and now entertains guests at five Disney theme parks worldwide.