An engineering marvel originally built in 1884, the Georgetown Loop railroad fulfilled the hopes of Georgetown citizens to become a prosperous settlement connected to Denver and points east. In connecting Silver Plume and Georgetown, towns over 2 miles apart, the tracks scaled an elevation of 640 feet over mountainous terrain, requiring trestles, cuts, fills, loops, and curves totaling 4.5 miles. Today the Loop is once again a popular tourist attraction and an uncommon way to see the Clear Creek Valley. Along the route visitors may stop for guided tours of a historic silver mine. The park is located on 978 acres and includes an 1884 depot, the Morrison Interpretive Center, two 1860s mines, an 1871 mill building, four reconstructed mine buildings, a locomotive maintenance building, the 1874 Pohle House, and a new rolling stock shelter.

A second, individual website for the park can be found here.

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

The Museum, through artifacts, photographs, and paintings tells the story of Oklahoma's territorial period. The facility covers approximately 10,000 square feet divided between two floors. The first floor presents exhibits embracing the first land run in the territories and the events leading up to the day, April 22, 1889. Exhibitions also cover the territorial lifestyle, including the homesteader and the urban aspect. Items related to territorial government, transportation, education, entertainment, and the statehood experience are presented in the second floor exhibits. Attached to the museum is the Historic Carnegie Library of Guthrie. Built in 1902, it hosted many important political and social events in early Oklahoma history and still houses its original furnishings.

The museum offers exhibits, tours, and educational and recreational events and programs.

In 1854, John Anderson Penn settled in the rugged cedar-covered hills of southwest Dallas County—an area known as the Cedar Mountains. Today, remnants of the original Penn Farm survive intact in the confines of Cedar Hill State Park. Penn Farm Agricultural History Center pays tribute to the disappearing Texas family farm and affords a glimpse into agrarian history as farm machinery took the place of the horse and mule almost a century ago. It includes reconstructed and historic buildings from the mid-1800s through the mid-1900s.

The site offers tours and occasional recreational and educational events.

The Oklahoma Historical Society's mission at the Fort Supply Historic Site is to educate the public about the history of Fort Supply and northwest Oklahoma through the preservation and interpretation of its historic resources. The five remaining buildings from the military period will be restored to their appearance of over 100 years ago. The 1875 Ordnance Sergeant's Quarters and the 1882 Civilian Employee Quarters are picket-style log buildings. These are rare examples of a common frontier construction method. The walls of these buildings consist of vertical logs. The 1879 Commanding Officer's Quarters and the duplex 1882 Officers' Quarters are the only frame houses left on "Officers' Row." The 1892 Guard House was the only brick building erected by the army at Fort Supply. It has been restored and furnished and contains the site's exhibit area. Each September Fort Supply hosts Cavalry Day, with costumed interpreters portraying military life on the frontier.

The site offers exhibits and occasional living history programs.

Old Sacramento State Historic Park is a cluster of noteworthy, early Gold Rush commercial structures. Historic buildings include the 1849 Eagle Theater; the 1853 B. F. Hastings Building, once home to the California Supreme Court; and the 1855 Big Four Building. Old Sacramento's historical significance comes from it being the western terminus of the Pony Express postal system, the first transcontinental railroad, and the transcontinental telegraph. With over 50 historic buildings, Old Sacramento has more buildings of historic value in its 28 acres than any area of similar size in the West.

A second website for the park can be found here.

The park offers exhibits, tours, educational programs, living history programs and events, and other educational and recreational events.

Lyndhurst was one of the most famous examples of Gothic Revival architecture in 19th-century America and served as the New York home to former New York City mayor William Paulding, merchant George Merritt, and railroad tycoon Jay Gould, respectively. The site serves as a great example of money and power in the Gilded Age.

Lyndhurst offers 30-minute group tours and award-winning education programs (on-site or in-schools) designed to follow New York State standards of learning.

The Frederick Law Olmsted National Historic Site commemorates the life of Frederick Law Olmsted (1822-1903), owner of the world's first full-scale landscape design office.

The site offers guided walking tours of Boston-area parks designed by Olmsted, outreach slide presentations, custom-designed educational programs in the "Emerald Necklace" parks, an educator's packet, and teachers' workshops.

The Frederick Law Olmsted National Historic Site is closed for construction. The site is expected to reopen in 2010.

Fort Richardson was established in November 1867 and was named in honor of General Israel B. Richardson, who died in the Battle of Antietam during the Civil War. The fort was the northernmost of a line of Federal Forts established after the Civil War. The soldiers arrived in Jacksboro in 1866 with orders to establish a fort at Buffalo Springs, 20 miles north of Jacksboro. Due to unhealthy conditions at Buffalo Springs and the constant Indian raids, the fort was abandoned. The soldiers returned to Jacksboro and eventually received orders to establish a fort on the South Bank of Lost Creek. Expeditions sent from Fort Richardson arrested Indians responsible for the Warren Wagon Train Massacre in 1871 and fought Comanches in Palo Duro Canyon. The Fort was abandoned in May 1878.

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

The Society operates two historic house museums: 1883 Maple Grove and the 1882 Propst House.

The society offers lectures, research library access, and occasional educational and recreational events; the museums offer tours.

The William H. Seward House preserves four generations (1816-1951) of artifacts of daily life; and presents the life of William H. Seward (1801-1872), Governor of New York, U.S. Senator, Secretary of State under Abraham Lincoln and Andrew Johnson, abolitionist, and organizer of the Republican Party. Seward was involved in the writing process of, and signed, the 1863 Emancipation Proclamation. The 1816 structure itself is Federal and Tuscan in style.

The house offers period rooms, tours, and brown bag lectures. Advance notification is required for groups of 10 or more.