In suburban Maryland, a tree grown from seed flown to the moon stands almost forgotten.

FDR's Art Deco hospital tower was hopelessly inefficient.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

A former major munitions plant that has been converted into a sprawling art space.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Perhaps the most scandalous statue of America's first president.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This rowhouse doubles as one of the most photographed spots in the nation's capital.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

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

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.