Watch This Amazing 4K Time-Lapse of the Chicago River Dyed Green for St. Patrick’s Day (VIDEO)

Green beer is a familiar libation during St. Patrick’s Day festivities, but unless you live in Chicago, green rivers are a far less common sight. In the amazing 4K time-lapse below, Chris Biela provides a great look at the temporarily green Chicago River running through his hometown.

Last weekend Chicago celebrated the upcoming Irish holiday by dumping 45 gallons of environmentally friendly vegetable dye into the Chicago River in an annual occurrence that’s been going on in the Windy City since 1962.

Biela is a Chicago-based landscape, cityscape, and time-lapse photographer and says he shot over 5,000 images in five hours for the video you see below. He notes that, “This year it was really cold at 19° which made it much harder to capture.”

You can see more of Biela’s fine work by visiting his website, and be sure to watch a beautiful time-lapse video of his we shared earlier of Wisconsin like you’ve never seen it before. When you hit the streets on Friday to celebrate St. Patrick’s Day, our suggestion is to imbibe green beer in moderation, take a splashproof camera, and avoid drinking from the river.