Visit Los Alamos, New Mexico

A black and white photo of a white building with a big white sign that has black writing that says, "Los Alamos Project Main Gate" A black and white photo of a white building with a big white sign that has black writing that says, "Los Alamos Project Main Gate"

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Los Alamos Project Main Gate during the Manhattan Project.

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A re-creation of the historic security gate is at Main Gate Park today.
Credit: NPS


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. During the Manhattan Project, Los Alamos became the home to many of the top scientific minds of the day: Dr. J. Robert Oppenheimer, Norris Bradbury, Richard Feynman, Hans Bethe, and many more luminaries. These scientists worked together to develop the theoretical and experimental tests that created the first atomic weapons, using enriched uranium from Oak Ridge and plutonium from Hanford. Today, the nucleus of this once-secret city is still Los Alamos National Laboratory, though you’ll find plenty of historic and cultural resources to explore as well.

Explore Los Alamos

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Visitor Center & Basic Info

Start your adventure with our visitor center in Los Alamos, NM.

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Directions & Map

Get directions to our visitor center.

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Places to Go

Find out about all the places in Los Alamos with connections to the Manhattan Project including historic sites and museums.

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Things to Do

Explore the Manhattan Project with activities throughout Los Alamos.

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US Department of Energy Tours

Learn about the US Department of Energy's guided tours of buildings that predate the Manhattan Project.

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Trip Ideas

Learn about trip ideas at Los Alamos that last either half day or all day.

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Nearby Attractions

Explore attractions in the region including state and national parks.

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Eat & Sleep

Find dining and lodging options in and around Los Alamos.


Let our park app be your guide

Our park app is an explorer's best friend. Find all the places and activities within Los Alamos related to the Manhattan Project. This includes guided tours with the US Department of Energy in Los Alamos. It also includes the many historic sites and educational centers within the community of Los Alamos, which the government planned and operated for the Manhattan Project, and the neighboring community of Santa Fe.


Last updated: February 20, 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