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Manhattan Project in Los Alamos: Bathtub Row Houses

Los Alamos was where efforts of the Manhattan Project came together to discover the science necessary to succeed—inventing the technical processes then producing and testing two nuclear devices. In Los Alamos, the park experience is a partnership among the Department of Energy, the National Park Service, private landowners, and Los Alamos County.
  • Guest Cottage, Los Alamos Ranch School, 1942

    6. Historical Museum

    Built as the infirmary for the Ranch School in 1918, this cottage is the oldest continuously used building in Los Alamos.

  • Guest Cottage, Los Alamos Ranch School, 1942

    6. Historical Museum

    It later served as a guest cottage for Ranch School visitors and was Gen. Leslie Groves' favorite place to stay.

  • Baker House

    7. Baker House

    Built in 1925, this house briefly served during the Manhattan Project as home to Sir James Chadwick, who discovered the neutron in 1932.

  • Baker House

    7. Baker House

    Later Robert Bacher, head of the Experimental Physics Division of the project, lived here.

  • Spruce Cottage, Los Alamos Ranch School

    9. Spruce Cottage

    This dormitory, for the older boys at the Ranch School, was converted into a Women’s Army Corps dormitory at the beginning of Project Y.

  • Spruce Cottage, 1942

    9. Spruce Cottage

    Eventually, it was divided into apartments, one of which was occupied by Kenneth Bainbridge, director of the Trinity test.

  • Arts and Crafts Building, Los Alamos Ranch School

    10. Arts and Crafts House

    Originally classrooms for the Ranch School, this building was divided into two apartments during the Manhattan Project.

  • Arts and Crafts Building, 1942

    10. Arts and Crafts House

    Among its residents were base commander Lt. Col. Whitney Ashbridge, a Ranch School graduate, and Norris Bradbury, second director of the Los Alamos laboratory.

  • Bethe House

    11. Bethe House

    Chemist Edwin McMillan and physicist Hans Bethe, both Nobel Prize winners, lived in this house.

  • Bethe House

    11. Bethe House

    This house will soon be a museum about the role Los Alamos played during the Cold War.

  • Oppenheimer House

    12. Oppenheimer House

    This house was built in 1929 for the sister of Ranch School Director A.J. Connell.

  • Oppenheimer House

    12. Oppenheimer House

    Dr. J. Robert Oppenheimer and his family lived here during the Manhattan Project.

  • Parsons House, 1942

    13. Parsons House

    Built in 1925, this house was originally occupied by Ranch School master Fermor Church and his wife, Peggy Pond Church, daughter of the school’s founder.

  • Parsons House today

    13. Parsons House

    During Project Y, Naval Commander William “Deak” Parsons lived here. Parsons served as the weapons officer aboard the Enola Gay.

Walking tour map of downtown sites

Manhattan Project National Historic Park walking tour of downtown sites