Ice Circle In North Dakota Caught On Camera, What Caused Rare And 'Surreal' Phenomenon? [VIDEO]

First crop circles, now this? Video of an enormous ice circle spinning in a river in North Dakota is making its way around the Internet after a hunter filmed the strange phenomenon last Saturday. The footage shows the ice circle, shaped like a giant flapjack, revolving like a frozen merry-go-round in the middle of the dark river. The icy disk was estimated to be nearly 55 feet in diameter.