The 24th annual National Geographic Traveler Photo Contest is in full swing. The entry deadline has been extended until July 11. The four categories include: Travel Portraits; Outdoor Scenes; Sense of Place and Spontaneous Moments. Last year's contest drew nearly 13,000 images from all over the world.

The pictures are as diverse as their authors, capturing an assortment of people, places and wildlife - everything that makes traveling so memorable, evoking a sense of delight and discovery. The following post includes a small sampling of the entrant's work, taken from the editor's picks in each of the categories.