This 1740 building is historically significant as the oldest courthouse in Illinois and the only one remaining from the state’s territorial period (1787–1818). It is architecturally significant as an example of the French Colonial vertical log poteaux-sur-solle ("post-on-sill") construction technique. Inside are three exhibit rooms and another furnished to represent the courtroom in the 1790s. Exhibits in the Courthouse depict issues that came before the court around 1800 and a history of the structure as it was moved in the early 20th century to St. Louis and Chicago before its eventual return to Cahokia.

The site offers exhibits, tours, and occasional recreational and educational events.

The Hose No. 5 Fire Museum presents firefighting history via artifacts. Collection highlights include a 1930 McCann pumper, a 1946 Jeep Willys outfitted for fighting forest fires, and a 1917 Garford pumper—one of three Garford fire engines still in existence. The museum is housed in a 1897 fire station. The station remained in use for nearly a century.

The museum offers exhibits.

The Buffalo Gap Historic Village preserves and presents the history and heritage of the last 50 years of the Texas frontier (1875–1925). The living history village contains at least 12 original building; a museum; collections of arrowheads, frontier weapons, and medical instruments; and two Model T hacks.

The village offers exhibits, lectures, audio wand tours, a school day utilizing 1925 curriculum, a curriculum guide, and vintage baseball.

Hillwood Estate, Museum & Gardens consists of a historic home and surrounding gardens. The Georgian mansion was originally designed in 1926; and was purchased by Marjorie Merriweather Post, heir to the Post cereal fortune, in 1955. The extensive gardens reflect a variety of influences and include a Japanese garden, one of the last remaining examples of the type of oriental gardens influenced by the reintroduction of the Japanese culture to America during the 1950s. Today the estate has one of the most comprehensive collections of eighteenth and nineteenth-century Russian Imperial art outside of Russia, as well as an extensive collection of eighteenth-century French decorative arts. Highlights include a diamond crown worn by Empress Alexandra at her marriage to Nicholas II; Beauvais tapestries designed by François Boucher; two Imperial Easter eggs by Carl Fabergé; La Nuit by William-Adolphe Bouguereau; and a collection of costumes and accessories worn by Mrs. Post or her family. Many artifacts can be viewed in the mansion.

The estate offers an introductory film; period rooms; exhibits; Acoustiguide tours for the home, gardens, Russian collection, and French collection, as well as a tour designed for children; guided tours of the mansion and gardens; self-guided written tours; custom tours; sign language, oral, or cued speech interpreters—with advance notice; Braille information guides; a resource area; and a non-circulating art research library. The website offers digital access to the collections.

The Blair County Historical Society seeks to preserve and share the history of Blair County, Pennsylvania. The society operates a museum with period rooms and exhibits on the early iron industry, transportation, medicine, military history, toys, geology, and education. The museum is housed in the Baker Mansion. This home was occupied by iron master Elias Baker and his family beginning circa 1836. Other sites operated by the society include the Royer Mansion, previously owned by another iron master; the Dick Schoolhouse; and Etna Furnace. The Blair County Historical Society holds a collection approaching 100,000 artifacts. The major period covered is 1850 through the 1920's. The collection includes a wide variety of items depicting everyday life, including clothing and accessories, furniture, household appliances, toys, china, ceramics and glassware, lighting devices, and tools. Other categories include firearms and military relics, medical tools and equipment, transportation artifacts, rocks and minerals, and material from local schools and businesses.

The society offers a traveling trunk focused on mid–19th–century daily life; Royer Mansion tours; Baker Mansion tours; a museum exhibits; research library; and archives.

The Adams Museum and House seeks to preserve and share the history of Deadwood, South Dakota and the surrounding Black Hills. The Adams Museum collections include folk art, Lakota artifacts, and Wild Bill Hickok's (1837-1876) gun, among other items. Other figures represented in the collections include Calamity Jane (1852-1903) and Deadwood Dick, a fictional character whose name was used by a variety of individuals. The Adams House is a 1892 Queen Anne Victorian, abandoned entirely furnished in 1934, which now functions as a circa 1900 house museum.

The museum offers three floors of exhibits and self-guided tours. The house offers period rooms and an orientation exhibit.

Atop the most southerly hill in a chain known as the Seven Sisters, William Hooker Gillette, noted actor, director, and playwright, built this 184-acre estate, the Seventh Sister. The focal point of his effort was a 24-room mansion reminiscent of a medieval castle.

A second website for the site, maintained by the Friends of Gillette Castle, can be found here.

The site offers tours and occasional recreational and educational events.

The Gene Stratton-Porter State Historic Site is the second home of the Hoosier author and nature photographer Gene Stratton-Porter (1863–1924). The site presents information on her life and sources of inspiration; and currently encompasses 125 acres of land, 20 of which were part of Porter’s original property. "The Cabin in Wildflower Woods," designed by Porter and built in 1913, is a two-story cabin with exterior walls of Wisconsin cedar logs. Much of Porter's furniture and personal memorabilia, including her library, are preserved at the home. In her lifetime, Porter authored seven nature books, two books of poetry, children’s books, numerous magazine articles, and 12 novels, including Song of the Cardinal and Freckles. Her personal interest was in writing about nature. However, her romantic works were most commercially successful. Stratton-Porter and her daughter, Jeanette's, graves are also on site.

The site offers group tours in accordance with state educational standards, educational outreach programs, and educational materials for checkout.

For 94 years, workers at the Ben Schroeder Saddletree Company crafted tens of thousands of wooden frames for saddle makers throughout the United States and Latin America. It was the nation's longest lasting, continually operated, family-owned saddletree company. John Benedict "Ben" Schroeder, a German immigrant, started his business in a small brick workshop in 1878, though it grew to include a woodworking shop, boiler room and engine shed, a sawmill, a blacksmith shop, an assembly room, the family residence, and several outbuildings. After his death, Ben's family kept his dream alive by adding stirrups, hames for horse collars, clothespins, lawn furniture, and even work gloves to their line of saddletrees. The factory closed in 1972 and was left completely intact. Recognized by historians as one of America's premier industrial heritage sites, the Schroeder Saddletree factory has been restored to allow visitors to Madison to tour through this vintage workplace. Belts turn and the original antique woodworking machines spin into action. Sawdust is whisked from machines into the boiler room, where it once fueled the steam boiler that powered the equipment. Saddletree patterns hang, cobweb covered, from the ceiling.

The museum offers tours, demonstrations, and exhibits.

Meadow Brook Hall is the fourth largest historic house museum in the United States. Built between 1926 and 1929 as the residence of Matilda Dodge Wilson (widow of auto pioneer John Dodge) and her second husband, lumber broker Alfred G. Wilson, the 110–room, 88,000–square–foot mansion is complete with vast collections of original art and furnishings. The exterior and most of the interior rooms at Meadow Brook Hall were designed in the Tudor-revival style. However, a few rooms were decorated in other period-revival styles: the dining room and Matilda’s study are 18th–century Neoclassical, Matilda’s room and the French bedroom are 18th–century French Rococo, and Frances’ bedroom is American Colonial. The hall's collections include original paintings, sculptures, prints and drawings, furniture, ceramics, carpets, glass, silver, costumes and other textiles, and family archival materials. Highlights of the collection include Tiffany art glass, costumes by Paul Poiret, Stickley furniture, paintings by Sir Joshua Reynolds, Sèvres and Meissen porcelain, and Rookwood pottery.

The hall offers guided mansion and garden tours, period rooms, educational programs, and a variety of special events, including lectures.