At a Glance

A behemoth disk of spinning ice formed in Maine this week.The disk spans about 300 feet across and has been spinning in the same spot of the Presumpscot River.The City of Westbrook posted about the disk and has since seen it blow up on social media.

In 2016, the town of Westbrook, Maine, became the source of internet fame when local police found a giant snake — who would go on to be called Wessie — eating a beaver near the Presumpscot River. A little over two and a half years later, the town is making headlines once again, but not for its hungry reptiles, no, this time it's alien-looking ice.

A in the Presumpscot River earlier this week, and the natural but rarely-seen phenomenon has since blown up on social media.

“,” Doug Bertlesman, whose office overlooks the river, told the Portland Press Herald.

Behold: Maine's Presumpscot River disk of spinning ice.

(Jack Milton/Newsflare)

“It’s certainly not every day that you can watch a spinning circle of ice in the river," Bertlesman said.

The disk was first seen by local office building owner Rob Mitchell around 10 a.m. Monday. Mitchell said he notified city officials as soon as he spotted the strange, counterclockwise-rotating disk.

“It’s stuck right there. It’s not going anywhere. I think it will continue to gain in thickness as long as it keeps spinning,” said Mitchell, adding that the massive saucer acted as a giant Lazy Susan for ducks that decided to investigate it.

If you were questioning the sheer size of the ice disk in Maine's Presumpscot River, take a look at how it compares to the four-story parking garage right next to it.

(City of Westbrook/Tina Radel)

These creepy, alien-like discs aren't unheard-of, however. In recent years, ice disks have popped up i, as the Associated Press reported, and , according to MLive.com.

Researchers from the University of Liège in Belgium concluded that natural disks like the ones mentioned above aren't being spun from the motion of the river they're in, , they reported in Physical Review E in 2016.

Water is densest at 39.2 degrees Fahrenheit, and as the disk cools the water around it, the water temperature falls to that magic number, causing water to sink and create a spin-driving vortex.

(MORE: Tallest Natural Sand Dune in the Eastern U.S. is Moving and Threatening Homes)

But sometimes people say 'forget Mother Nature!' and create their own icy merry-go-rounds. On almost the exact same date Westbrook's natural ice disk was discovered, a group of people in .

“It took 49 minutes to get all the way, one full rotation, the first time we spun around,” volunteer Becca Ruegemer told the Twin Cities Pioneer Press.

While Westbrook's disk won't be beating the Little Falls disk in diameter, it could grow in size with more snow on the way.