This Month in Photo of the Day: National Geographic Magazine Imagined lords of a golden underwater city—the Encante—Amazon dolphins, or botos, may have been shielded from exploitation by their mythical status. See more photographs from the June 2009 feature story "River Spirits."

This Month in Photo of the Day: National Geographic Magazine At an electric plant in southern Spain, mirrors as big as houses catch some of the 120 quadrillion watts of sunlight that constantly fall on Earth. Government subsidies for this pricey yet promising power source have made Europe the world's solar capital. See more photographs from the September 2009 feature story "Plugging Into the Sun."

This month in Photo of the Day: Images From the National Geographic Archive The second atomic bomb tested in Operation Crossroads From the upcoming National Geographic book The Image Collection, due fall 2009. Shop for other photography books from National Geographic.

This Month in Photo of the Day: Your Photos Staying in Asia for many years has given me the opportunity to get close to wildlife on many occasions. This female Smith's green-eyed gecko chose to live on one of the chalets next to my home, taking advantage of the insects attracted by the lights at night.

This Month in Photo of the Day: Your Photos My grandfather was born and raised on our New Zealand farm. He and my grandmother were married nearly 60 years. Preparing for a photo in the barley, my grandmother lovingly reached up to adjust his hat. This was his last harvest.

This Month in Photo of the Day: Your Photos The second Friendwood, Texas, flood of 2009 settled to reveal this beautiful casualty among the browns and swamp greens. This photo and caption were submitted to the 2009 International Photo Contest. See photo galleries, play jigsaw puzzles, and download wallpaper.

American Bullfrog in Green Grass Photograph by Matthew Smith This Month in Photo of the Day: Your Photos American bullfrog looking up This photo and caption were submitted to the 2009 International Photo Contest. See photo galleries, play jigsaw puzzles, and download wallpaper.

Praying Mantis on Brooklyn Bridge Photograph by Abigail F. Lee This Month in Photo of the Day: Your Photos Nature finds you in unexpected places in New York City. This photo and caption were submitted to Your Shot. Have a great shot? Send it to us for possible publication in National Geographic magazine.

Blue Lagoon Photograph by David Crowe This Month in Photo of the Day: Your Photos A picture taken with my trusty (and heavy) Pentax 6x7 at 10:30 in the evening on the longest day of the year. NOT Photoshopped!. This photo and caption were submitted to the 2009 Traveler World in Focus Photo Contest.

Girl in Church Pews Photograph by Wade Dunkin This Month in Photo of the Day: Your Photos A young girl at a wedding rehearsal This photo was submitted to Your Shot. Have a great shot? Send it to us for possible publication in National Geographic magazine.