Los Alamos Places

Black and white photo of a building with a sign that reads "Los Alamos Project Main Gate". Black and white photo of a building with a sign that reads "Los Alamos Project Main Gate".

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Los Alamos Project Main Gate during the Manhattan Project.

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A replica of the historic security gate in Los Alamos today.
Credit: NPS

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. During the Manhattan Project, Los Alamos became the home to many of the top scientific minds of the day: J. Robert Oppenheimer, Norris Bradbury, Richard Feynman, Hans Bethe, and many more luminaries. These scientists, along with engineers and military officials, worked together to design, develop, and assemble atomic weapons, using enriched uranium from Oak Ridge and plutonium from Hanford. On August 6 and 9, 1945, the US detonated these two atomic bombs over the Japanese cities of Hiroshima and Nagasaki. Explore Los Alamos and the Manhattan Project through six themes that weave the different places within and around Los Alamos together.
Several youths play ice hockey on a frozen pond with a house and trees in the background.

Learn about the people that called Los Alamos home before the Manhattan Project.

A man checks the badge of another man in a car.
Secret Cities & Communities

Immerse yourself in the community and culture of Los Alamos during the Manhattan Project.

A small white sided building with a sign reading "Los Alamos Project Main Gate" on a muddy road.
Behind the Fence

Peek behind the fence to explore the top-secret atomic weapons program at Los Alamos.

Two men stand next to a large metal orb.
Breaking Scientific Boundaries

Explore the groundbreaking discoveries and scientific pioneers of Los Alamos.

A woman holding a child smiles at a man in a suit.
Untold Stories

Discover the unique and little-known stories of Los Alamos.

Men sit facing an unseen presenter in rows of folding armchairs atop a scuffed wood floor.

Follow the lasting legacy of the Manhattan Project from past to present.



Last updated: May 3, 2023

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Contact Info

Mailing Address:

Manhattan Project National Historical Park
c/o NPS Intermountain Regional Office
P.O. Box 25287

Denver, CO 80225-0287


Hanford: 509.376.1647
Los Alamos: 505.661.6277
Oak Ridge: 865.482.1942

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