Disneyland's "secret restroom" is an isolated, disabled-accessible bathroom tucked away to one side of the castle in the Carnation Plaza. Very easy to miss, it is a refuge when all around the park is chaos. This site is a loving (and somewhat tongue-in-cheek) tribute to the toilet that Walt forgot.
The moment you open its door (assume it's unlocked), you will be overwhelmed by just how enormous the Secret Restroom is. As a point of fact, the Secret Restroom is not only larger than the average American home restroom, it's larger than the typical Anaheim apartment that can be afforded on a Disneyland castmember's starting salary.
Because the Secret Restroom is cleaned ever half hour, it is always in a state of perfection and readiness, and even a glance shows the luxuriance of its copious amenities and artistic touches (each of which is detailed elsewhere on this site).