Sarah Leen has a job most people in the world would envy. She looks at photographs for a living. And not just any photographs — National Geographic photographs. As our Director of Photography, Leen estimates she has looked at as many images “as there are stars in the sky,” so it’s hard to narrow down her favorites. But she does that every year — here are her favorite 100 of the over two million submitted to us this year, in no particular order.