Happy St. Patrick's Day.
The dyeing of American rivers for St. Patrick's Day is a tradition nearly as old as barfing in a crowded place. According to folks in the know, cities use dyes with a compound that turns the water green like magic. See for yourself:
Some of the best images have come from Chicago, where the normally not-as-beautiful Chicago River cuts a dramatic green path through the Windy City's heralded cityscape. Here are some of the best pictures:
This story originally appeared on The Wire. More from our partner site: