The oldest ride at Disneyland Park in California is a bit of a trivia challenge, but the answer is the King Arthur Carrousel. While Disneyland opened on July 17, 1955, the carrousel itself is actually older than the park, having been originally built by the William Dentzel Company in 1875 for an amusement park in Toronto. Walt Disney purchased the antique carrousel and meticulously restored it, adding additional jumping horses to ensure every guest had a "moving" horse. Aside from the carrousel, there are several other "Opening Day" attractions from 1955 that remain operational today, including Mad Tea Party, Mr. Toad's Wild Ride, Peter Pan's Flight, Snow White's Enchanted Wish (formerly Scary Adventures), and the Mark Twain Riverboat. In the broader context of "Disney heritage," the Prince Charming Regal Carrousel at Magic Kingdom in Florida is physically older (built in 1917), but in terms of the Disneyland Resort's specific history, the King Arthur Carrousel stands as the most ancient piece of operating machinery, continuing to provide its 150-year-old charm to new generations of visitors in 2026.