Oak Ridge

A black and white photo of a two-story building with many windows. A black and white photo of a two-story building with many windows.

Left image
The Guest House was built in 1943. Photo taken 1945.

Right image
The Guest House today.

The rolling hills and narrow valleys of East Tennessee proved to be the ideal location for the top-secret atomic weapons program developed there beginning in 1942. Oak Ridge, Tennessee was home to several massive Manhattan Project facilities employing thousands of workers during and after World War II and was the headquarters for the project after relocating from New York City. The facilities in Oak Ridge produced enriched uranium for use in the world’s first atomic bomb, Little Boy, which was dropped over Hiroshima, Japan on August 6, 1945. Today, Oak Ridge carries on the legacy of those fateful years so long ago. Several highly-secured nuclear research facilities still exist in the community, and the city is home to a wealth of historic sites that tell the remarkable story of the Manhattan Project and the dawn of the atomic age. Explore the Manhattan Project in Oak Ridge through six common themes that weave the different places in and around Oak Ridge together. 

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Last updated: March 26, 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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