The Yolo County Historical Society seeks to preserve and share the history of Yolo County, California. To this end, the society operates the Spring Lakes School and the Hattie Weber Museum. The school is used to introduce students to education and the school experience circa 1890. The Hattie Weber Museum presents the local history of Davis, California and the surrounding areas. The museum is named after Davisville's first paid librarian, who began her career in 1906.

The society offers educational programs for students in the Spring Lakes School, and exhibits and school tours in the Hattie Weber Museum.

The California State Indian Museum displays exhibits and artifacts illustrating the cultures of the state's first inhabitants. California's prehistoric population, one of the largest and most diverse in the Western hemisphere, was made up of over 150 distinct tribal groups who spoke at least 64 different languages. California Indian population estimates, before the arrival of the first Europeans, were at least 500,000 people. California Indian cultural artifacts in the museum include basketry, beadwork, clothing, and exhibits about the ongoing traditions of various California Indian tribes. Descendents of the first Californians, tens of thousands of them, still live in California and still cherish and carry on their unique cultural heritage. Indigenous people have donated many photographs of family, friends, and memorable times for use in the museum. A section of the museum features a hands-on area, where visitors can try their hand at using Indian tools, such as the pump drill, used for making holes in shell beads and other materials and the mortar and pestle and soap root brush, made from the soap root plant, all used for grinding acorns.

The museum offers exhibits and tours.

The Meux House Museum is focused on preserving the beautiful Meux home, a premier architectural treasure of Fresno. The home was built in 1889 by Dr. Thomas Meux, formerly of Tennessee. The Meux family occupied the home until 1970, and now is open as a historic house museum.

The museum offers guided tours and special events. The website offers a brief biography of Dr. Meux, a brief history of the home, and visitor information.

Petaluma Adobe State Historic Park was the main residence of Rancho Petaluma, the agricultural empire that made General Mariano Guadalupe Vallejo one of the most powerful men in the Mexican Province of California from 1834 to 1846. Vallejo ran his cattle, hide, and tallow business; raised sheep; bred horses; and grew numerous crops. The adobe contains authentic furniture and exhibits depicting early rancho life. The huge adobe building, the largest private rancho in California between 1834 and 1846, was the center of activity on one of the most prosperous private estates established during the Mexican period.

The park offers exhibits; tours; and occasional recreational and educational events, including living history events.

The El Cajon Historical Society seeks to preserve and share the history of El Cajon Valley, California—with a particular emphasis on archival documents. To this end, the society operates the Knox House Museum. The museum contains the personal artifacts of the settlers who came to the El Cajon area between 1895 and 1912. The museum structure itself was built in 1876.

The museum offers exhibits, period rooms, and tours. Please call ahead to arrange tours and to verify that the museum will be open at the time you plan to visit.

This site is used by local Native Americans as a ceremonial meeting place. The park features special events and tours. Gathering Day, held the third Saturday of October, includes demonstrations of dancing, crafts, and basket weaving.

The park offers tours and educational and recreational events.

Jack London State Historic Park is a memorial to writer and adventurer Jack London, who made his home at the site from 1905 until his death in 1916. The park was once part of the famous writer's Beauty Ranch. The park contains the cottage residence where he wrote books, short stories, articles, and letters while he oversaw various agricultural enterprises. After London's death, his wife, Charmian, continued to live in the cottage until her death in 1955. It was her wish that the ranch be preserved in memory of Jack London and his work. There is a museum in "The House of Happy Walls," which Mrs. London built in a redwood grove.

The park offers tours and exhibits.

The 1908 Point Arena Lighthouse is one of the western coast's taller lighthouses at 115 feet in height. Prior to the implementation of electricity, maintaining the light's rotation required a 160-pound weight to be cranked to the highest point in the lighthouse every 75 minutes.

The lighthouse offers guided tours and self-guided grounds tours.

The Nethercutt Collection consists of more than 200 vintage automobiles, as well as mechanical musical instruments, hood ornaments, antique furniture, and musical pocket watches. Automobile makers represented include McFarlan, De Dion Bouton, Maybach, Deusenberg, and Rolls-Royce. At any given time, 30 automobiles are on display.

The collection offers 2-hour guided tours. Reservations are required. Jeans, shorts, and children under 12 are not permitted.

The Escondido History Center is located in downtown Escondido in the historic Grape Day Park. The center serves as a local history museum, and also maintains the Escondido Historical Society's archives and collections.

The center offers guided tours and exhibits. The website offers basic visitor information.