Huge build up of foam on the Big Sioux river in South Dakota
Huge build up of foam on the Big Sioux river in South Dakota

A huge amount of foam built up on Friday (February 28th) on the Big Sioux River at Falls Park in South Dakota in the USA.

Photographer Justin Frantzen compared the scene to a "bubble bath." A milder winter has kept these falls moving compared to recent years when they have iced over.

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