A rare natural phenomenon taking shape in the US state of Maine is mesmerising people around the world.
A giant slow-turning ice disc, measuring approximately 91m (298ft) wide, has formed in the Presumpscot River in the city of Westbrook.
The captivating natural oddity has drawn comparison to an alien spacecraft, a carousel and the Moon.
Researchers believe ice discs spin because of temperature changes in the water, creating a vortex underneath.
The movement chips away the edges, creating its circular shape.
The large rotating disc has served as a raft for ducks and other birds, news reports said.
City of Westbrook authorities were notified of the disc by a local businessman, and used a drone to capture the moonlike ice formation.
The Ice Circle in my backyard! Check it out! It's amazing !!!!!!!!!!!!!Posted by Adam Farnsworth on Monday, January 14, 2019