A relic of FDR's brief foray into utopian urban planning.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

This former Cold War missile control site played an important role in the creation of GPS.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A building shaped like the Army Corps of Engineers logo, because why not?

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The wooden airship was the largest flying boat ever built.

This enormous World War II relic is one of the largest wooden structures in the world.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The ancient tomb acts as a calendar that keeps perfect time.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

The man who wasn't there.