In 1778, General George Washington ordered Fort Mifflin, built in 1777, to hold off the British Navy while the Continental Army traveled to its encampment site at Valley Forge. While the Continental soldiers were eventually forced to abandon the fort, Washington and his troops were able to reach their destination thanks to the soldiers' efforts. Since, the fort has served as a War of 1812 garrison, Civil War prison, and a munitions depot for both World Wars. Today, the fort contains 14 restored structures, the originals of which were built between 1778 and 1815.

The fort offers tours; weapons demonstrations; cannon firings; overnight Scout programs; and educational programs on the U.S. flag, the Revolutionary War, and the Civil War.

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.

The Martin Van Buren National Historic Site contains of Lindenwald, the 220-acre farm where Martin Van Buren (1782-1862) spent the last 21 years of his life. Having served as Secretary of State, Vice President, and the eighth President of the United States, Van Buren conducted two additional (unsuccessful) presidential campaigns from this house before retiring as a gentleman farmer. His administration (1837-1841) is largely remembered for the Panic of 1837, which preceded a five-year economic depression. Conflict concerning the need to maintain national unity and Van Buren's disapproval of the institution of slavery in newly admitted states presaged the upcoming Civil War. The mansion itself contains 36 rooms.

The site offers mansion and grounds guided tours, period rooms, and educational programming. These programs consist of in-classroom activities, with one program also making use of web-based learning. The website offers an extensive virtual tour of the mansion.

Designed and built under the supervision of Fountain Branch Carter in 1830, this house was occupied successively by three generations of his family. The Carter House commemorates the tragic Civil War Battle of Franklin, said to have been one of the bloodiest in the 19th century. The Confederates suffered 6,606 casualties. Of the Union forces, 2,326 soldiers were killed. The Carter House was the command post of Major General Jacob D. Cox, Federal field commander of Schofield's delaying action. It became the center of some of the heaviest fighting, and by the morning of December 1, 1864, it had been ravaged by bullets and parts of its roof splintered by cannon. East and south of the house some 13 charges were made by Confederate soldiers. The greatest loss of general officers in the war occurred in this battle on December 1. Nearby, Captain Theodoric Carter, C.S.A., scion of the Carter family, was mortally wounded, and died in the house on December 2.

A second website for the site can be found here.

The house offers a short film, exhibits, tours, educational programs, and occasional recreational and educational events (including living history events).

Peter Conser was born in 1852 and died in 1934. Inside the house everything is arranged very much as if Peter and family had just left.

The house offers tours.

The Museum focuses on the life and times of the photographer Alice Austen. The house features views of New York Harbor, and displays a collection of negatives that depict turn-of-the-century American life.

The museum offers tours, educational programs, and recreational and educational events, and is open to the public throughout the year, with the exception of January and February. The website offers a brief history of the location along with basic visitor information.

The Andrew Johnson National Historic Site honors the life of the 17th President. Andrew Johnson's presidency, 1865–1869, illustrates the United States Constitution at work following President Lincoln's assassination and during attempts to reunify a nation torn by civil war. His presidency shaped the future of the United States and his influences continue today.

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

Fort Union Trading Post was the most important fur trading post on the upper Missouri from 1828 to 1867. At this post, the Assiniboine, Crow, Cree, Ojibway, Blackfeet, Hidatsa, and other tribes traded buffalo robes and other furs for trade goods such as beads, guns, blankets, knives, cookware, and cloth.

The site offers a short film, exhibits, demonstrations, educational programs, and occasional recreational and educational events (including living history events).

Visitors to Steamtown can feel the heat from the firebox, hear the bell and whistle, smell the hot steam and oil of a past era. They can feel the ground vibrate under their feet, see the one-ton drive rods turn the wheels, and hear the chuff-chuff-chuff of the smokestack. Today, visitors can relive the era of steam as the engines come back to life. The cinders, grease, oil, steam, people, and stories of railroading have returned at Steamtown. Visitors may tour the History and Technology Museums or Roundhouse, explore special exhibits, or watch the movie "Steel and Steam." They can also join a Park Ranger or Volunteer on a guided tours of the Locomotive Repair Shops. Seasonally, visitors may want to experience the short train rides, longer train excursions, or Living History Programs.

The site offers a short film, exhibits, tours, educational programs, demonstrations, train rides, longer film screenings, and occasional recreational and educational events (including living history events).

Fort Churchill was once an active U.S. Army fort. Built in 1861 to provide protection for early settlers, it was abandoned nine years later, and today the ruins are preserved in a state of arrested decay. A visitor center displays information and artifacts of the fort's history. The Pony Express and the Overland Telegraph once passed through this area. Nearby is Buckland Station, a Pony Express stop, supply center, and a former hotel built in 1870.

The site offers exhibits.