The Grier Musser Museum is a restored turn–of–the–century Queen Anne house which displays antique collections in monthly holiday exhibits throughout the year.

The museum offers exhibits and special event guided tours.

The Benicia Fire Museum houses historic fire service equipment and hundreds of related items from the Benecia Volunteer Firemen Incorporated, the oldest continuous volunteer fire service in California (dating to 1847). Fire equipment from the former Benicia Arsenal Military Reservation in also on display. Collection highlights include a 1920's Phoenix engine, a circa 1855 Solano engine, an 1833 Griffin pumper, a replica of the first hand pumper, a circa 1932 Dodge, and the only open cab four wheel drive fire engine west of the Mississippi.

The museum offers exhibits.

The Humboldt County Historical Society seeks to preserve and share the history of Humboldt County, California. The society is housed in the Gross-Wells-Barnum House, a 1902 Colonial Revival structure. Much of the lower floor is open to the public.

The society offers lectures, essay contests, a newsletter, a research library, and archives. The website offers newspaper articles on historic topics.

The Glendale Fire Department Museum presents historical information and artifacts relevant to firefighting and to the Glendale Fire Department.

The museum offers tours.

The Wells Fargo History Musuem presents the role of Wells, Fargo & Co., a joint stock banking and express business company founded in 1852, in the commercial history of Sacramento, California. Artifacts of note include an original Concord Coach, historical panoramic paintings, original maps and views of Sacramento, a Wooten patent desk, and The Livingston Sacramento Postal History Collection.

The museum offers exhibits.

The 13–acre Eugene O'Neill National Historic Site commemorates the only Nobel Prize–winning U.S. playwright, through preservation of the Tao House. A Spanish–colonial structure with an interior scheme inspired by Chinese Taoism, this building served as the home of O'Neill and his wife Carlotta between 1937 and 1944. Eugene O'Neill (1888–1953) is the author of The Iceman Cometh, Long Day's Journey Into Night, and A Moon for the Misbegotten, among other works. His pieces introduced realism to American drama, were among the first U.S. plays to include speeches in the vernacular, and are populated with marginalized characters.

The site offers guided tours of the Tao House, self–guided tours of the grounds, and twice yearly presentations of O'Neill's plays. Reservations are required to enter the house.

The Santa Barbara Trust for Historic Preservation preserves and interprets historic sites in Santa Barbara County, California. The trust was involved in the reconstruction of El Presidio de Santa Bárbara State Historic Park and the Casa de la Guerra, and operates the Santa Inés Mission Mills in Solvang, California. These are 2 grist and fulling mills dating to the 1820's. The trust's collections date from the 18th century to the 20th century.

The mission mills are not currently open to the public, as they are in transition to being incorporated in a state park. However, tours can possibly be arranged by calling the trust. An introductory film (which is also available for rental), exhibits, educational programming for elementary school students, guided tours designed for specific grade levels, living history demonstrations, craft events, lectures, summer camp, and high school elective courses are available at El Presidio de Santa Bárbara State Historic Park and/or the the Casa de la Guerra. The trust offers a research center.

This park preserves some of the rapidly vanishing cultural landscape of the citrus industry and tells the story of this industry's role in the history and development of California. The park recaptures the time when "Citrus was King" in California, recognizing the importance of the citrus industry in southern California. In the early 1900s, an effort to promote citrus ranching in the state brought hundreds of would-be citrus barons to California for the "second Gold Rush." The design of the park is reminiscent of a 1900s city park, complete with an activity center, interpretive structure, amphitheater, picnic area, and demonstration groves. The land contained within the park still continues to produce high-quality fruits.

The park offers exhibits, tours, demonstrations, educational programs, and recreational and educational events.

The Victorville Fire Museum presents a collection of firefighting equipment and memorabilia dating from the 1930s, as well as artifacts and information pertinent to the historical development of the Victorville Fire Department. The museum is housed in one of the city's earliest fire stations, Station No. 1.

The museum offers exhibits and tours.

Bidwell Mansion State Historic Park is a three-story, 26-room Victorian house museum that stands as a memorial to John and Annie Bidwell. John Bidwell was known throughout California and across the nation as an important pioneer, farmer, soldier, statesman, politician, and philanthropist. Annie Ellicott Kennedy Bidwell, the daughter of a socially prominent, high-ranking Washington official, was deeply religious, and committed to a number of moral and social causes. Annie was very active in the suffrage and prohibition movements.

The park offers a short film, exhibits, and tours.