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  • Discover the stories and people behind the Manhattan Project and how they shaped the world we live in today.

    Preserving and sharing the nationally significant historic sites, stories, and legacies associated with the top-secret race to develop an atomic weapon during World War II.

    In 1943, as World War II raged across the globe, the United States government secretly constructed a laboratory on a group of isolated mesas in northern New Mexico. The top-secret Manhattan Project had a single military purposedevelop the world’s first atomic weapons. The success of this unprecedented government program forever changed the world.

    Historic Manhattan Project Sites at Los Alamos

    The Manhattan Project National Historical Park encompasses 17 sites on Los Alamos National Laboratory property and 13 sites in downtown Los Alamos, where “Project Y” was centered during World War II.

    • Manhattan Project Historical   Featured Virtual Tour

      The Manhattan Project at Los Alamos

      In Los Alamos, New Mexico, Manhattan Project administrators found an ideal location for the secret laboratory where they designed and built the world’s first atomic weapons.

    • The Manhattan Project at Hanford

      Nuclear reactors at Hanford (now the Hanford Site) produced plutonium for the Manhattan Project to fuel the first atomic test and the Fat Man atomic bomb.

      Manhattan Project Historical   Featured Hanford
    • Manhattan Project Historical   Featured Oak Ridge

      The Manhattan Project at Oak Ridge

      Several massive Manhattan Project facilities at Oak Ridge enriched uranium for use in Little Boy, the atomic bomb dropped on Hiroshima, Japan on August 6, 1945.

    Virtual tour of the historical sites

    Discover the stories, people, and locations behind the Manhattan Project with our interactive virtual tour.