The iconic "Disney water smell" experienced on rides like Pirates of the Caribbean and It's a Small World is primarily caused by the use of bromine instead of chlorine as a sanitizing agent. While most public pools use chlorine, which has a sharp, bleach-like scent, Disney utilizes bromine because it is more effective at killing bacteria in high-volume, moving water systems and is generally gentler on guests' skin, eyes, and clothing. Bromine produces a distinct, slightly sweet, and "musty" metallic odor that many fans find nostalgic. In 2026, this scent has reached cult status, with third-party companies selling "Pirate Water" scented candles and room sprays to recreate the atmosphere at home. The smell is further enhanced by the damp, cool air of the ride buildings and the faint scent of ozone from the heavy electrical ride machinery, creating a unique sensory "trigger" that many guests immediately associate with the Disney parks.