Los Alamos Historical Museum, History museum in Los Alamos, United States.

The Los Alamos Historical Museum occupies three buildings: the Guest Cottage beside Fuller Lodge, the Bethe House where Hans Bethe lived briefly after World War II, and the Oppenheimer House, J. Robert Oppenheimer's residence while he directed the Los Alamos Laboratory. The Guest Cottage holds exhibits on the Ancestral Pueblo people, early homesteaders, the Los Alamos Ranch School and the Manhattan Project.

The Guest Cottage is one of three buildings that make up the Los Alamos History Museum, alongside the Bethe House and the Oppenheimer House. It belonged to the Los Alamos Ranch School, founded by Ashley Pond II on Boy Scout lines, which the government seized in 1943 for the Manhattan Project. General Leslie Groves preferred to stay here during the project.

The exhibits trace how this place evolved from Ancestral Pueblo settlements through a ranch school era to a major research center. Walking through the displays helps visitors see how different communities shaped this location over time.

The museum occupies three separate buildings: the Guest Cottage beside Fuller Lodge, the Bethe House a short walk away, and the Oppenheimer House, which is awaiting renovation before it opens to visitors. Plan to move between them on foot, and check ahead about access to the Oppenheimer House.

The Guest Cottage was General Leslie Groves's preferred lodging during the Manhattan Project, and it now forms one of the museum's three buildings alongside the Bethe House and the Oppenheimer House. The last of these, where J. Robert Oppenheimer lived while directing the Los Alamos Laboratory, is still awaiting renovation before it opens to visitors.