![]() NPS/BURNETT Start with our Visitor Center in Los AlamosIn 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. Isolated on top of a mesa, with canyons cutting through the surrounding landscape, this place provided the remoteness they required. Still, Santa Fe was relatively close, giving them access to transportation and other resources. Drop by our visitor center to start your Manhattan Project National Historical Park experience in Los Alamos. Speak with park rangers, stamp your passport book, pick up a junior ranger book, and learn about ranger programs.
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Basic Information We offer a traditional NPS passport stamp as well as a unique three-part stamp. Travel to our visitor centers in Los Alamos, Oak Ridge, and the Tri-Cities to receive one-third of a stamp. By the end of your journey, you will have a whole stamp.
Many of the park’s historic properties are located “behind the fence” on secure Department of Energy nuclear reservations. Public access is only permitted though public tours facilitated by the Department of Energy.
If you are planning to explore areas of the park that are closed to pets, we recommend that you contact a local pet care provider. Commercial kennels and pet sitters are available in surrounding communities. Please check local listings. Reservations are strongly advised and may be required. The National Park Service has a national policy on service animals that applies to all parks. For more information about pets in parks, visit the National Park Pets website.
Free public WiFi is available in certain areas in Los Alamos including Ashley Pond, Fuller Lodge, and some local businesses. Cellular service available in Los Alamos proper.
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Last updated: August 20, 2025