Thanks to a temperature inversion last week, the Grand Canyon was filled with fluffy white clouds, making the natural wonder look like a giant bowl of milk.

"Total cloud inversion" is a result of a layer of warm air trapping cold, wet air underneath. In this case, the unusually warm weather encased thick white fog into the canyon. The result is reminiscent of a giant, ghostly swimming pool. These weather conditions are pretty rare, but also happened last December; they most commonly occur in the colder months as a result of long, cold nights. 

Tourists in the area lucked out, but you at home can also enjoy the sight: the Grand Canyon National Park took some incredible pictures, and even a timelapsed video. 

For your viewing pleasure: 

(via Colossal and Neatorama)