The hypnotic drawbridge dance on the Chicago River may build the ire of people unlucky enough to be stuck in their cars, trapped by the klaxon-call of slow maritime progress beneath the street. But it also marks the finer days in our fair city.
Warm weather, sunshine and fun at the lakefront. Some of the best Chicago has to offer.
So as yet another steel-grey day morphs into early night, take a few seconds and think about the summer, courtesy of YouTuber Brunopier in this timelapse shot as a sungle boat floats its way through downtown - a shot that took an hour to get, but you can enjoy in about 30 seconds.