Featured Challenges
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National Historic Landmark Photo Contest
by U.S. Department of the Interior
Grab your camera and snap a picture of your favorite National Historic Landmark, our nation's most significant places.
Winners announced
Recent Challenges
App-lifying USGS Earth Science Data
App-ly Yourself to Tackle Today's Scientific Challenges
Military and Veterans Photo/Essay Contest
by U.S. Department of the Interior
The Bureau of Land Management and Sierra Club Mission Outdoors ask veterans, active duty military, and their families to tell us what the public lands mean to them.
National Natural Landmarks Program Photo Contest
Calling all photographers! Submit your favorite National Natural Landmark site photos to highlight and illustrate our Nation's diverse and scenic natural heritage.
Winners announced