It's been a St. Patrick's Day tradition in Chicago for years, the traditional dyeing of the Chicago River green.Now you can see how it was done in high definition. According to the videoagrapher:

Time lapses shot from Sheraton Grand Chicago and thanks to management. Location provides beautiful views along a river and Chicago Skyline.

 

I would love to see the City of Rockford do this next year for the Annual Rockford St Patrick's parade, how 'bout you?