It's no wonder why we choose to build our cities near rivers — they give us water, natural borders and transportation. But they can also give us other things, strange things. Whether it's the boiling river in the Amazon that can cook animals or the unfathomably beautiful Caño Cristales that blooms with a rainbow of colors annually, we found 10 of the world's weirdest rivers.
Tim Muttoo via Flickr
Boqiang Liao via Flickr