Disneyland (Anaheim, CA), opened to the general public on July 18, 1955

1. Those impossibly hard-to-open plastic wraps, called clamshell packaging, cause over 6,000 visits to the emergency room each year.
2. Disneyland (Anaheim, CA), opened to the general public on July 18, 1955, has the second most annual visitors at 15.9 million. Number one? Disney World (Lake Buena Vista, FL), with 17.2 million.