Learn About the Manhattan Project

A color map that highlights Hanford, Washington; Los Alamos, New Mexico; and Oak Ridge, Tennessee.

Established in 2015, the Manhattan Project National Historical Park preserves and interprets the nationally significant historic sites, stories, and legacies associated with the top-secret race to develop atomic weapons during World War II. In August of 1945, the US dropped atomic bombs on Hiroshima and Nagasaki, Japan. This helped to bring an end to WWII and forever obligated future generations to live in a profoundly changed and nuclear world.

The Manhattan Project quickly grew from its New York Manhattan District headquarters to more than 30 top-secret sites around the country. The smaller sites supported work at the project’s three primary centers of operations: Hanford, Washington; Los Alamos, New Mexico; and Oak Ridge, Tennessee. Most of the research, innovation, production, and weapons fabrication occurred at these three locations.

Today, we partner with these communities to interpret Manhattan ProjA red, white and blue logo.ect history and its enduring legacies. All three communities are designated as American World War II Heritage Cities to honor their contributions to America's war effort during World War II. There are many ways to learn about the people, places, and stories of the Manhattan Project. Explore your options below.

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History & Culture

Learn about the history and culture of the Manhattan Project.

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Science & Engineering

Learn about the science and engineering of the Manhattan Project.

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Learn about the Manhattan Project's latest news and events.

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What is the Manhattan Project?

Read an introduction to the Manhattan Project.

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Photos & Multimedia

Explore our photos, app and multimedia.

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Kids & Youth

Become a Junior Ranger!

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Explore Manhattan Project education programs and curricula.

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Learn about our Days of Peace and Remembrance.

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Learn about the management of the park.

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Explore a glossary of scientific, historical, and social terms related to the Manhattan Project.


Last updated: March 25, 2024

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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

Contact Us