When I saw this photo, I immediately made it my wallpaper. (Link to the hi-res download.)
From The Telegraph:
Dutch photographer Albert Dros, 31, visited Guatemala earlier this year where, after careful planning, he captured this stunning photo of the Fuego Volcano in mid eruption.
“When I saw the volcano erupting up close, combined with the powerful sound it made, I was just paralyzed,” he says. “This was amazing. It was literally one of the most impressive natural phenomenon I had ever seen.