In honor of World Photography Day, we’ve put together some of the most interesting and popular photos from the Flickr community. Be sure to check out our Flickr Commons participating institutions for more great images, or try a search color, size and aesthetics to discover the extraordinary trove of photographic treasures on Flickr.

Wildlife photography pioneers Richard and Cherry Kearton taking a photograph of a bird’s nest:

Arthur Ollman and Ansel Adams in 1982:

And some of Ansel Adams’ black and white landscapes (full album here):

This encounter between two spiral galaxies by NASA on The Commons:

One of the most loved photos on Flickr with a Creative Commons license:

A stunning shot from Elena Shumilova, a superb photographer from Russia:

Our dear friend Rosie Hardy, a fine art and conceptual photographer who transcends the limits of imagination.

Or take this hilarious moment at the White House, when this child couldn’t abide any more adult conversation, even with the most powerful man in the world:

We think you’ll love almost every picture by NASA (Here is a breathtaking image of Moon crossing the Earth):

This portrait of Dalai Lama by Christopher Michel:

This image of Yichang, China, still captivates us months after we shared it with you on our social media channels:

What is your favorite? Share your Flickr link with @Flickr and on our Facebook page, including the hashtag #WorldPhotographyDay!