Flickr's Explore is basically the daily top 500 photos posted on Flickr on that day. It's not necessary the BEST photo - how Flickr picks the 500 photos, remains a mystery. But I have had a few hundred explored photos, a few of which became #1 or in the top ten.
Art of Smoke, explored February 4, 2017
Waves, explored January 12, 2018
Marina, Explored January 3, 2018
Snow Day at the Bean, Explored, February 18, 2018
Snowy Day Bean, Explored February 18, 2018
What's the opposite of clothing optional? Explored December 29, 2017
Yoga in the Morning, Explored September 10, 2017
The Man with the Red Umbrella, Explored, July 13, 2017
