A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The historic home of an educator, abolitionist, activist, and poet.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

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

For over 70 years, this house was home to a pioneering Black artist and educator.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

A derelict bit of transportation infrastructure hidden in the woods.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

Over the last century, this elegant columned facade has been home to the headquarters of a bank, several nightclubs, and a restaurant.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

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.

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

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

The only Leonardo Da Vinci painting in the Western Hemisphere.

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.

The 28,000-year-old specimen is remarkably intact.

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

Art deco landmark on the outskirts of Washington, D.C.

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