Disneyland, 1955
Disneyland originally opened in Anaheim, California on Sunday, July 17th, 1955 with a total of 18 attractions. The park now has 51 attractions.
When the park opened, admission was just $1. It's now $99. Over 84 million Mickey Mouse ears have been sold since Disneyland opened, making the ears the most popular Disneyland souvenir of all time.
As of December 2018, Disneyland had the largest cumulative attendance than any other theme park in the world. It has had more than 726 million visits since opening its doors.
In 2018 alone, the park had around 18.6 million visits (it was in second place for the most visited theme park that year, just behind Magic Kingdom, also owned by Walt Disney).
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It also became a soft drink by accident. One day someone walked into Jacobs Pharmacy with a headache and needed a bottle. It was originally intended to be mixed with water before drinking. He didn't want to wait to get home and asked for it to be mixed at the soda fountain there in the drugstore. The tap was down at the other end of the counter, so the man behind the counter just mixed it with soda water. The result is what we know today.
More trivia: In Chinese, "Coca cola" translates to "Bite the wax tadpole."