This remote military post was established in 1853 to assist in conflict resolution between Native Americans and gold-seekers and settlers who had begun flooding into the area after the discovery of gold in the northern mines. Fort Humboldt was formally abandoned in 1870 and rapidly fell into decay. Today, only the hospital building remains out of the original fourteen structures. It is now a historical museum dedicated to telling the story of the Fort and the Native American groups, including the Wiyot, Hoopa and Yurok of this region. In the 1980s the Surgeon's Quarters was reconstructed and there are plans for its establishment as a period house museum. In 2001 an historic herb and vegetable garden was recreated adjacent to the Hospital. The park also includes a Logging Museum and open air displays of historic 19th- through mid-20th-century logging equipment including the Dolbeer Steam Donkey, "Lucy"; the Bear Harbor Lumber Company's Gypsy Locomotive #1; and the Elk River Mill and Lumber Company's #1 "Falk" locomotive.

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

Reed Gold Mine is the site of the first documented gold find in the United States. It was here in 1799 where Conrad Reed discovered a 17-pound yellow rock, which later turned out to be gold and was sold for only $3.50. From this discovery, gold mining spread gradually to nearby counties and eventually into other southern states. Sections of the mine's old underground tunnels are open for guided tours. The site includes a museum with exhibits on gold mining and several nature trails.

The site offers a short film, exhibits, tours, demonstrations, and occasional recreational and educational events.

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 Historic Pullman Foundation supports visitation, preservation, and restoration of the historic town of Pullman, Illinois. Founded in 1880 by George M. Pullman, president of Pullman's Palace Car Company, as a model industrial community, Pullman was situated for easy access to the big city markets of the day via rail. Buildings of note include the 1881 Hotel Florence; the 1880 rail car construction facility; the 1893 Market Hall, and the 1887 Greenstone Church, which contains one of the few manual tracker organs in the U.S. today. Artifacts on view include furniture from the Pullman Mansion and Hotel Florence, as well as a model train collection of Pullman manufactured rail cars.

Historic Pullman offers exhibits, an educational video, self-guided tours, walking tours, and tours specifically for schools and/or large groups.

The Historic Manheim Preservation Foundation and Museum presents artifacts of local historical interest including written records, china, ceramics, early U.S. furniture, and Stiegel glass. Henry William Steigel or "Baron Steigel" (1720–1785) founded Manheim in 1762 and was the originator of one of the earliest glass manufacturing operations in 18th-century America.

The foundation offers exhibits, the Ensminger Library, and lectures.

The site preserves surviving portions of the industrial complex developed in the early 1880s by George M. Pullman (1831–1897) to build luxury railroad passenger cars. The site, though under heavy reconstruction, features special interest tours of the factory site and regular temporary exhibits, and participates in or co-hosts a number of special events and cosponsors community programs for all ages and backgrounds.

The site offers research library access, exhibits, tours, lectures, workshops, and other educational and recreational events and programs.

Hagley Museum and Library collects, preserves, and interprets the unfolding history of American enterprise. Hagley is the site of the gunpowder works founded by E. I. du Pont in 1802. This example of early American industry includes restored mills, a workers' community, and the ancestral home and gardens of the du Pont family.

The museum offers exhibits, tours, educational programs, research library access, demonstrations, and recreational and educational events (including living history events).

The Tod Engine Foundation works towards the preservation of the history of the steel industry in Youngstown, Ohio. A big part of the foundation's focus is the preservation of the equipment used to manufacture steel. The Tod engine was a 260 ton rolling mill steam engine built in Youngstown that was central in one of the area's biggest steel plants. The foundation has recently completed the Tod Engine Heritage Park, a park in Youngstown housing the Tod engine and a small museum.

The heritage park offers exhibits regarding the steel industry and the Tod Engine. Volunteers can give visitors a sense of the importance of the Tod Engine. The website offers historical information regarding the steel industry and Tod Engine.

The New Bedford Whaling Museum chronicles the history of the whaling industry in New Bedford and New England in general. The museum also serves as a local history museum, with exhibits on New Bedford’s past.

The museum offers a variety of exhibits pertaining to whaling and New Bedford, special events such as lectures and presentations, and educational programs that operate year-round. The website offers visitor information, a calendar of events, a summary of all exhibits, and information regarding educational and special programs.

The Jerusalem Mill is over 228 years old, and operated continuously for two centuries. Today, the mill serves as the Gunpowder State Park headquarters and visitor center, and offers a variety of exhibits. In addition to the mill, visitors can also explore the surrounding village. Both the village and the mill are listed on the National Register of Historic Places.

The mill offers a variety of special events, including blacksmithing demonstrations and living history exhibits, and offers exhibits on park history. The website offers a brief history of the park and visitor information.