If you're walking down Main Street, you'll be able to see the wonkiest walls in the whole of Disneyland. This isn't a fault that they've tried to cover, it's simply a testing wall. It has a number of bricks which are different sizes and colours so it looks a bit strange, and of course, wonky. This is because Walt was trying to decide on what bricks he wanted to use when building the park. The wall is located behind a water fountain, next to the lockers on Main Street.