An overlooked memorial honoring the local Washington residents who died in World War I.

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

There’s a hidden military meme engraved on the World War II Memorial.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

The national park was once a plantation estate.

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

This taxidermy horse was a Civil War hero.

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

A much-maligned monument to teetotalism.

Go take a picture with the inventor of the daguerreotype photographic process.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

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

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Washington's iconic carousel has a nice piece of Civil Rights history.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

A museum and tribute to a brave profession.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.