The Washington Monument is the most prominent, as well as one of the older, attractions in Washington, D.C. It was built in honor of George Washington, who led the country to independence, and then became its first President. The Monument is shaped like an Egyptian obelisk, 555' 5/8" high, and averages 30 to 40 miles visibility in clear weather. It was finished on December 6, 1884.

The monument offers elevator rides to its top.

Visitors can walk through one of Vermont's most beautiful landscapes, under the shade of sugar maples and 400-year-old hemlocks, across covered bridges, and alongside rambling stone walls. Ranger-guided tours of the historic 1869 Marsh-Billings-Rockefeller Mansion and gardens explore the history of conservation; the stewardship ethic of the Marsh, Billings, and Rockefeller families' and community-based conservation in a more modern context. In addition to original furnishings and personal items, the mansion displays works of art that include some of America's finest landscape paintings, highlighting the influence painting and photography had on the conservation movement.

The site offers exhibits, research library access, tours, and educational and recreational programs.

Arlington House was the home of Robert E. Lee and his family for 30 years and is uniquely associated with the Washington and Custis families. George Washington Parke Custis built the house to be his home and a memorial to George Washington, his step-grandfather. It is now preserved as a memorial to General Lee, who gained the respect of Americans in both the North and the South.

The house offers exhibits, tours, and educational programs.

Clara Barton National Historic Site commemorates the life of Clara Barton, founder of the American Red Cross. The home served as the headquarters and warehouse for the organization.

The site offers tours, performances, and educational and recreational events.

The Battle of Stones River began on the last day of 1862 and was one of the bloodiest conflicts of the Civil War. The battle produced important military and political gains for the Union, and it changed forever the people who lived and fought here.

The battlefield offers exhibits, films, tours, living history demonstrations, and other educational and recreational programs and events.

The Frederick Douglass National Historic Site is dedicated to preserving the legacy of the most famous 19th-century African American. His life was a testament to the courage and persistence that serves as an inspiration to those who struggle in the cause of liberty and justice. Visitors to the site learn about his efforts to abolish slavery and his struggle for rights for all oppressed people.

The site offers tours, a film, and exhibits.

Adams National Historical Park tells the story of four generations of the Adams family (from 1720 to 1927). The park has two main sites: the Birthplaces of 2nd U.S. President John Adams and 6th U.S. President John Quincy Adams, and Peacefield including the “Old House,” home to four generations of the Adams family, and the Stone Library which contains more than 14,000 historic volumes.

The site offers guided tours of the homes.

Washita Battlefield National Historic Site protects and interprets the setting along the Washita River where Lt. Col. George A. Custer led the 7th U.S. Cavalry on a surprise dawn attack against the Southern Cheyenne village of Peace Chief Black Kettle, November 27, 1868. The attack was an important event of the Indian Wars era.

The site offers exhibits, an introductory film, guided tours, and lectures.

The 184.5–mile Chesapeake & Ohio Canal National Historical Park preserves the history of this canal, which shipped coal, lumber, grain, and other agricultural products along the Potomac River. The canal's story intertwines with those of western expansion, transportation, engineering, the Civil War, immigration, industry, and commerce. Rangers provide a mid–19th–century living history experience, and the park also offers an option of staying overnight in one of several historic lockhouses–each with interpretive media and furnishings which simulate the living conditions of the lock keeper's family during the 1830s, Civil War, the early 1900s, or the 1950s.

The park offers two replica canal boats, drawn by mule; docents in period dress; ranger–led hikes, walks, lift lock demonstrations, power point presentations, and mule programs; canal boat tours; Junior Ranger activities; and a period room overnight experience. The website offers lesson plans, photo galleries, and a coloring page.

Fort Union was established in 1851 to protect area inhabitants and trade routes. During its forty-year history, three different forts were constructed close together. The third Fort Union was the largest in the American Southwest, and functioned as a military garrison, territorial arsenal, and military supply depot for the southwest. The largest visible network of Santa Fe Trail (an ancient Native American trade route) ruts can be seen here.

The monument offers interpretive talks, guided tours, living history programs, and a 1.6 mile self-guided interpretive trail.