Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

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

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

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

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

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

This taxidermy horse was a Civil War hero.

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

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

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

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

There’s a special club house at the top for the bell ringers.

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

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

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.