"It's a Small World" is an Old Mill boat ride located in the Fantasyland area at various Disney theme parks around the world, including Disneyland Park in Anaheim, California; Magic Kingdom at Walt Disney World Resort in Bay Lake, Florida; Tokyo Disneyland, Disneyland Paris, and Hong Kong Disneyland. The inaugural version of the ride premiered at the 1964 New York World's Fair before permanently moving to Disneyland in 1966.

An old mill is a type of amusement park ride where unaccompanied boats float on guideways and traverse through dark tunnels. These themed dark rides originated in the late 19th century and are known by a variety of names, including tunnel of love and river cave. While generally considered a gentle ride, a variation of an old mill featuring a climactic splashdown ending, similar to the modern-day log flume, is known as a mill chute.