Description: Most Popular Photos / 500px. The top rated photos on 500px right now, as voted on by the community of photographers and enthusiasts. Many of the best images on 500px are available for royalty-free licensing.

Description: One Big Photo - a Picture is Worth a Thousand Words | Submit Your Photo | World's Best Photography. a Picture is Worth a Thousand Words | Submit Your Photo | World's Best Photography

Description: The Big Picture - The Boston Globe. The Big Picture is a photo blog produced by a select group of picture editors of The Boston Globe. The majority of the images come from wire services such as the Associated Press, Reuters, and Getty Images, who license them to The Boston Globe for our use. Other photos come from public domain sources such as NASA, and others from private photographers who share them with the Big Picture for one-time use. Entries are posted every Monday, Wednesday, and Friday. The Big Picture is intended to highlight high-quality, amazing imagery, with a focus on current events. For more information about The Big Picture, please review the About page at the Big Picture’s previous home on Boston.com.

Description: Ostriches On The Go | Nat Geo Photo of the Day. A flock of ostriches runs across Namibia's Etosha Pan in this image from our photography archives.