The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The only place for a truly presidential dram.

One of the oldest standing structures in Montgomery County, Maryland.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

FDR's Art Deco hospital tower was hopelessly inefficient.

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

A super-sized promotional trick that is now a D.C. landmark.

The United States Capitol's former columns still stand.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

Every drop of D.C. tap water flows through this old waterworks.

A historic arena where the Beatles played their first concert in the U.S.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The tunnel under the Capitol Building where Congress takes out its trash.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The span is crooked and made from two older recycled bridges.