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One of the most unusual St Patrick’s Day traditions occurs in Chicago, where the river is transformed into a vibrant shade of green. Each year, the Chicago Plumbers Union plays a crucial role in this festive spectacle by releasing a special mixture into the river through a range of plumbing pipes and pumps.
The process begins with the mixture in an orange hue, which, when introduced to the water, quickly changes to a vivid shamrock green as the dye settles. This striking transformation has become a hallmark of the city’s St Patrick’s Day celebrations, attracting both locals and tourists alike who gather to witness this peculiar yet colourful display.