Dawn of the Atomic Age

This site tells the story about the people, events, science, and engineering that led to the creation of the atomic bomb, which helped end World War II.

Image of historic entry gate in Los Alamos, New Mexico

Los Alamos

Did you know this was located in Los Alamos, New Mexico?

Calutron Girls at Oak Ridge Site

Oak Ridge

Find out more about the atomic age and the Manhattan Project site, in Tennessee.

Image of Hanford Reactor

Hanford

Find out more about the Manhattan Project site in Hanford, Washington

Guided Tours

Guided Tours

Depending on the location, guided tours are available.

Free Mobile App Tour of Project-Y

Free Mobile App Tour of Project-Y

New free mobile app allows users to take virtual tour of Project-Y of Manhattan Project NHP at Los Alamos

Contact the Park

Mailing Address:

Manhattan Project National Historical Park
c/o NPS Intermountain Regional Office
P.O. Box 25287

Denver, CO 80225-0287

Phone:

(303) 969-2700

The number above is for the Manhattan Project NHP headquarters office.

-- Los Alamos Visitor Center: (505) 661-6277

-- Oak Ridge Visitor Center: (865) 576-6767

-- Hanford Visitor Center: (509) 376-1647

Contact Us