The Harry Potter franchise is a whole magical world hidden in plain sight.
It's no surprise, then, that The Wizarding World of Harry Potter is full of Easter eggs for the obsessive and/or extremely bored.
A key element of the attraction are 'spells' that can be cast, using magic wands sold at convenient kiosks, because park designers are evil geniuses.
When you buy a wand, you're given a map with the locations you can use it.
But there are secret spells not listed on the map ...
at least not listed under normal light.