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The Manhattan Project is one of the most transformative events of the 20th century. It ushered in the nuclear age with the development of the world’s first atomic bombs. Most of this development took place in three secret communities located in Hanford, WA, Los Alamos, NM and Oak Ridge, TN. Today, you can visit these three sites that make up Manhattan Project National Historical Park. Read More
Discover a secret factory that made plutonium.
Learn about a covert lab that built the atomic bombs.
Explore a hidden complex that enriched uranium.
Explore the history of the Manhattan Project via its people, places, culture, and events.
Join rangers for a variety of fun and informative programs suitable for all ages.
Learn about the US Department of Energy's guided tours of buildings behind the fence.
Register for a guided bus tour behind the fence in Oak Ridge, TN with the US Department of Energy.
Last updated: June 18, 2025
