The National Postal Museum, a Smithsonian Institution museum, is located in the old Post Office building next to Union Station in Washington, D.C. The Museum was created by an agreement between the Smithsonian Institution and the United States Postal Service in 1990 and opened to the public in 1993.

President Lincoln's Cottage is a national monument on the grounds of the Soldiers' Home, known today as the Armed Forces Retirement Home. It is located near the Petworth and Park View neighborhoods of Washington, D.C.. President Lincoln's Cottage was formerly known as Anderson Cottage. President Abraham Lincoln and family resided seasonally on the grounds of the Soldiers' Home to escape the heat and political pressure of downtown Washington, as did President James Buchanan (1857–1861) before him. President Lincoln's Cottage also served as the Summer White House for Presidents Rutherford B. Hayes (1877–1881) and Chester A. Arthur (1881–1885) The historic Cottage, built in the Gothic revival style, was constructed from 1842 to 1843 as the home of George Washington Riggs, who went on to establish the Riggs National Bank in Washington, D.C. Lincoln lived in the cottage June to November 1862 through 1864 and during the first summer living there, Lincoln drafted the preliminary draft of the Emancipation Proclamation. Mary Todd Lincoln fondly recalled the campus; in 1865, she wrote, "How dearly I loved the Soldiers' Home." The Soldiers' Home stands on 251 acres (1.02 km2) atop the third highest point in Washington. The Home was designated a National Historic Landmark…

Every Saturday morning from 9am-12pm the National Railway Historical Society opens its Railroad and Railway Workers Museum to vsitors who enjoy the days of olde. See everything from tools and equipment used by railway workers of the past century and the many other train related items, Railway Express Baggage car, restored cabooses, and the grounds containing various signalling and Maintenance of Way equipment. Members are on hand to provide more detailed explanations of railroad equipment. operations and safety. Weather and other conditions permitting board the restored crew cars used by the workers in the early to mid twentieth century and take a liesurely excursion along the Spotsylvania County tracks along Deep Run. 

The Renwick Gallery is a branch of the Smithsonian American Art Museum, located in Washington, D.C., and focuses on American craft and decorative arts from the 19th century to the 21st century. It is housed in a National Historic Landmark building that was begun in 1859 on Pennsylvania Avenue and originally housed the Corcoran Gallery of Art (now one block from the White House and across the street from the Old Executive Office Building). When it was build in 1859, it was known, at the time, as the American Louvre. The first-floor gallery features temporary exhibits that usually rotate about twice a year. On the second floor, in the Grand Salon, is one of the most famous art-filled rooms in Washington, it is hung with 70 paintings, by 51 American artists, painted between 1840 and 1930. The Renwick Gallery, the Museum's branch location for contemporary American craft and decorative arts, is located steps from the White House in the heart of historic federal Washington.

The International Gallery is home to a revolving and exciting array of visiting exhibitions. Check at the information desk in the Castle for show information. Enter at the copper-domed kiosk on Jefferson Drive next to the Castle. American Sabor: Latinos in U.S. Popular Music (July 11, 2011-Oct. 9, 2011). One of the first interactive museum exhibitions to tell the story of the profound influence and impact of Latinos in American popular music, including jazz, R&B, rock 'n' roll and hip-hop. Artists At Work (June 23, 2011-Oct. 2, 2011) Ripley Center Concourse. Works in all media—painting, sculpture, photography and video—by Smithsonian staff. The Discovery Theater The Discovery Theater offers the best in live performing arts for young people. Each season more than 30 performances feature puppets, music, theater, storytelling, dance and cutting-edge science for groups and families. Visit DiscoveryTheater.org or call 202-633-8700. SITES Smithsonian Institution Traveling Exhibition Service (SITES) showcases 40 to 50 exhibitions in cities across the nation every year. Look for a Smithsonian traveling exhibition scheduled to visit your community at sites.si.edu.