The National Autism History Museum at 4186 Adams Ave in San Diego's Kensington is the first museum in the country dedicated to the history of autism research, diagnosis, and advocacy. Operated by the Autism Research Institute—founded in 1967 by Dr. Bernard Rimland—the four-room museum sits adjacent to ARI's main office on Adams Avenue and traces the evolution of autism understanding from the first clinical description in 1925 through the present. The Kensington address in the 92116 ZIP places the museum on Adams Avenue east of Kensington Drive, and nearby resources for families include the Kensington-Normal Heights Branch Library on Adams Avenue, which carries its own collection of autism and neurodiversity literature. Executive Director Stephen M. Edelson, Ph.D. oversees a collection that includes the first issue of the Journal of Autism and Childhood Schizophrenia, a galley proof of Dr. Temple Grandin's Thinking in Pictures, brain tissue slides from Drs. Thomas Kemper and Margaret Bauman's pioneering neuroanatomy research, and a monitor from Dr. Beth Mallow's landmark sleep study. QR codes throughout the exhibits link to audio and video recordings that expand on the displayed artifacts, including a video of Dr. Rimland's son Mark demonstrating his remarkable calendar-memory ability. Timeline banners inside the museum map diagnostic criteria changes since 1961, reported prevalence rates from 1966 through 2022, and the origins of Applied Behavior Analysis. Admission is free, and the museum is open by appointment for groups, school visits, and researchers. Kensington's walkable Adams Avenue corridor gives visiting families access to the neighborhood's dining and park options, and Old Trolley Barn Park at Adams and Florida streets provides an outdoor space less than a mile west for children who need a sensory break after the indoor exhibits. Dr. Rimland's personal archive forms the collection's backbone, and the museum continues to receive artifact donations from researchers worldwide.