Last updated: June 18, 2025
One Park, Three Sites, Countless Stories
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
Visit Hanford, Washington
Discover a secret factory that made plutonium.
Visit Los Alamos, New Mexico
Learn about a covert lab that built the atomic bombs.
Visit Oak Ridge, Tennessee
Explore a hidden complex that enriched uranium.
What is the Manhattan Project?
Explore the history of the Manhattan Project via its people, places, culture, and events.
Join a Ranger Program in Hanford
Join rangers for a variety of fun and informative programs suitable for all ages.
Tour Behind the Fence in Los Alamos
Learn about the US Department of Energy's guided tours of buildings behind the fence.
Tour Behind the Fence in Oak Ridge
Register for a guided bus tour behind the fence in Oak Ridge, TN with the US Department of Energy.