The Three Lakes Historical Society is dedicated to preserving the history of Three Lakes and all of northeastern Wisconsin. The society owns and operates a museum, which features artifacts and memorabilia from the Three Lakes region along with a restored log cabin. The cabin serves as a historic house museum where visitors can gain an appreciation for pioneer life in the northern midwest.

The site offers visitor information and a brief history of the society.

The Cooper-Molera Adobe was fully restored in the 1980s and now shows visitors the full elegance and wealth of the John Rogers Cooper family. In addition to the home, the adobe also has two full acres which are open to visitors. Visitors can see the barns, vegetable and fruit gardens, and farm animals that the Cooper family owned.

The home offers guided tours. The website offers basic historical and visitor information.

"The Milo Historical Society was formed in 1970 by a group of community members with an interest in collecting, preserving, and promoting the history and the heritage of the Town of Milo, Maine." In 1996, the society's museum was moved from the old Milo Town Hall into the oldest church building in the community. The museum itself features a collection of local artifacts as well as a historic archive.

The site offers eight photo albums, including photographs from the museum, historical information about the town of Milo, and an events calendar.

Santa Cruz Mission State Historic Park is the site of a complex of buildings erected around the original Santa Cruz Mission. Part of the cluster, the Neary-Rodriguez Adobe was built in 1791 and is the last of the mission's many buildings to survive. The single-story adobe has been restored to its original appearance. Misión la Exaltacion de la Santa Cruz was the 12th mission built in California. It was completed during the 1790s. Damaged by several earthquakes, it collapsed in 1857.

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

Fort Selden was established in 1865 in an effort to bring peace to the south-central region of present-day New Mexico. Built on the banks of the Rio Grande, this adobe fort housed units of the U.S. Infantry and Cavalry. Their intent was to protect settlers and travelers in the Mesilla Valley from desperados and Apache Indians. Several of the units stationed at the fort were black troopers, referred to as Buffalo Soldiers. A young Douglas MacArthur called the fort home while his father was post commander in the late 1880s. By 1890 criminals and raiding parties were no longer considered a threat as hostilities eventually lessened and the fort was no longer needed. Like many small forts in the Southwest the government decommissioned the fort and it was abandoned in 1891. Today the stark adobe brick walls of the frontier past evoke a feeling of personal connection to the past. A visitor center offers exhibits on frontier and military life.

The site offers exhibits and occasional recreational and educational events (including living history events).

Ed Z'berg-Sugar Pine Point State Park contains nearly two miles of lake frontage, with dense forests of pine, fir, aspen, and juniper. Another attraction is the Hellman-Ehrman Mansion (also known as Pine Lodge), a summer home built in 1903 in a grove of pine and cedar. From the turn of the century until 1965, the lands of what is now Ed Z'berg-Sugar Pine Point State Park were owned by financier Isaias W. Hellman, and later by his daughter Florence Hellman. The mansion provides a view into the lifestyles of the wealthy on Lake Tahoe.

The mansion offers tours.

Historic Prince William is a non-profit organization dedicated to "disseminating historical information through programs and publications, promoting historical preservation and protection of County resources through public education, and broadening the base of public interest in local history by sponsoring tours, speaking in schools, supporting research, and printing material of historical interest." The organization works tirelessly to preserve historic structures in Prince William County as well as help support national treasures like Manassas Battlefield.

The site offers photographs of historical structures in Prince William County, a history section with articles and features on Prince William County History, and publications on Prince William County history for sale.

"To help Iowans comprehend who they are and what they can become, the State Historical Society of Iowa serves as a trustee of Iowa’s historical legacy and an advocate for understanding Iowa’s past." The society does this by collecting, preserving, and managing Iowa's historical resources. In addition, the society focuses on educating Iowans of all ages, conducting and encouraging historical research, and encouraging historical preservation and education efforts throughout the state. The society also operates a museum of Iowa history and a research archives and library.

The site offers visitor information for the museum and research resources, history and visitor information regarding all of Iowa's historic sites, resources for historic preservation, information on the publications offered by the society, information on the educational programs offered by the society, library access, a card catalog, and five online exhibits.

The South Dakota State Historical Society was first organized as the Old Settlers Association of Dakota Territory in 1862. Today, the society is an office within the Department of Tourism and Economic Development, and manages five programs—archaeology, archives, historic preservation, museum, and research and publishing. All programs with the exception of the State Archaeological Research Center are located in the Cultural Heritage Center building in Pierre.

The site offers library access, research information, visitor information regarding the museum, a listing of all exhibits with photographs and a brief synopsis, and on online store for society publications.

Save Our Seminary at Forest Glen is a nonprofit organization founded to "combat the neglect of the unique, beautiful, and historic buildings and landscape of the National Park Seminary in Silver Spring, Maryland." To this end, the organization has worked tirelessly to restore many of the buildings in the seminary, and runs tours of the seminary for visitors from March through November. The seminary complex dates to circa 1887.

The organization offers tours. The website offers visitor information, an online store, a history of the seminary, and information on how to get involved.