National Geographic Traveler magazine received over 18,000 entries from around the globe for their annual photo contest this year. Submissions included stunning shots of ice caves, desert views and scenes from around the world.

The winning entry, captured by Marko Korošec, is of a supercell storm over the plains of eastern Colorado. “The storm was tornado warned for more than one hour, but it stayed an LP (low precipitation) storm through all its cycles and never produced a tornado, just occasional brief funnels, large hail, and some rain,” the photographer explained to Nat Geo.

“This winning photo of a supercell over the plains of eastern Colorado stopped the judges in our tracks,” added National Geographic Traveler Director of Photography, Dan Westergren. “When we first saw the picture we guessed that the photographer probably had dedicated quite a bit of time chasing storms to capture such an amazing sight. But what makes the picture particularly strong is that except for the cloud, the rest of the scene is quite ordinary. The crazy UFO-looking shape gives the impression that it’s going to suck up the landscape like a tablecloth into a vacuum cleaner. The unresolved tension in the image makes me want to look at it over and over.”

Check out the rest of this year’s winners at National Geographic’s website.