Several women sit on stools along a long hallway full of dials and meters.
The Calutron Girls worked at the Y-12 Electromagnetic Isotope Separation Plant in Oak Ridge during the Manhattan Project. US Department of Energy/Ed Westcott

Manhattan Project National Historical Park

National Historic Site · New Mexico · National Park Service

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.

Plan your visit

Know before you go

Phone
Hanford: 509.376.1647
Official site
www.nps.gov
Managed by
National Park Service

Getting there

Directions on Google Maps →

What's here

Highlights: African American Heritage · Military · Science, Technology and Innovation · Tragic Events · Wars and Conflicts · World War II · Women's History

Activities & features: Guided Tours · Junior Ranger Program · Park Film · Museum Exhibits

Photos

  • Gray factory building like stacked boxes with single taller smokestack beneath cloudy blue skies.
    NPS
  • Uniformed park ranger talks animatedly to visitors on a hillside overlooking a sprawling urban area.
    NPS
  • Two-story white house with two small windows, a single door, and flat roof stands in a gravel lot.
    NPS
  • Uniformed park ranger points to distance of fountain and trees as visitors sit enraptured.
    NPS
  • Wooden chair sits amid light blue paneling covered in dials, meters, screens, and buttons.
    NPS
  • A ranger is surrounded by visitors at a security gate, awaiting a ranger-led walk.
    NPS

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48 parks mapped in New Mexico

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Sources: National Park Service, Google Places · updated 2026-08-12