Photojournalists and amateurs worldwide can enter this contest.

The Smithsonian magazine is accepting submissions for its 10th Annual Photo Contest.

Participants can enter photographs for judging in one of five categories: altered images, Americana, the natural world, people and travel.

Smithsonian will notify the 50 finalists by February 28, 2013. From these 50 finalists, five category winners and a grand prize winner will be selected. The entries of all finalists will be published on the magazine's website on March 1, 2013. At that time, readers can vote online for one readers' choice winner.

The grand prize winner will receive a Smithsonian Journeys trip, or the wholesale cash equivalent (approximately US$3,000). Each category winner, along with the readers' choice winner, will receive US$500.

The submission deadline is November 30 at 2 p.m. Eastern Standard Time.

For more information, click here.