The 13th Annual Smithsonian.com Photo Contest selected the very best images from among more than 46,000 entries from photographers in 168 countries and territories in an array of categories -- Natural World, The American Experience, Travel, People, Altered Images, Mobile and Sustainable Travel.
Here are the winners and a selection of the finalists.
The photo "Under Pressure" by Adam Taylor from Seattle, Washington was a finalist in the Sustainable Travel category.
The image was captured underneath the Mendenhall Glacier in Juneau, Alaska. Taylor feels "the image has the ability to educate and give hope. Hope that with the right mindset, we can preserve the beauty that surrounds us by living sustainably."
Radim Schreiber' photo "Synchronous Fireflies" was the winner in the Altered Images category.
The photographer took several long exposures in almost complete darkness, which were merged together. He said being completely surrounded by the fireflies (lightning bugs) was "one of the most amazing and magical natural phenomena: fireflies that synchronize."
The Readers' Choice Winner was Alice van Kempen for "Orient Express."
Van Kempen, from Belgium, photographed her bull terrier in an abandoned train as part of a series called "Leave Only Pawprints: Urbex Adventures With My Bull Terrier Claire." The photo is an HDR image composed of three different images.
The photo "Trucker Chapel" taken by Lauren Pond of Columbus, Ohio is the winner of the American Experience category.
Truck driver Ben Blackburn, 46, participates in a Bible study session at the Transport for Christ (TFC) mobile chapel in Lodhi, Ohio, Oct. 23, 2013.
Transport For Christ, an international trucker ministry, has placed 45 mobile chapels at truck stops across the United States. The chapels offer Bible study, worship services and counseling from volunteer chaplains. They also give drivers a break from the struggles and solitude of life on the road.
Zuch explained, "Every day millions of people make use of the suburban trains in Mumbai. Almost every train has separate compartments for women to avoid sexual abuse."
Credit: Tamina-Florentine Zuch. All rights reserved
Altered Images - Finalist
This image of two mandrills titled "Conspiracy," taken by Pedro Jarque Krebs of Spain, was a finalist in the Altered Image category.
The photo is composed from portraits of two mandrills living at the Madrid Zoo Aquarium. The photographer applied different exposure and contrast corrections, among other photoshop techniques. The black background that recreates an image in the studio was done in post-processing, isolating the animals from the rest of the environment to focus on the subject
"Papa's Got a Brand New Bag," taken by Suzan Meldonian from Boca Raton, Florida, was a finalist in the Natural World category.
The image shows a yellow -headed jawfish male incubating eggs in its mouth. According to the photographer, "in the beginning, the jawfish is able to swallow the eggs, keeping them hidden, and occasionally spits them out to grab a bite, then sucks them back in, all in one gulp." She added, "that after about an hour of observation with this little fish, he accepted that I was not a predator and that my presence could actually protect him. Soon he became comfortable and almost even proud to show off his family to be."