The most decorated dog of World War I is preserved in the Smithsonian.

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

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

When it comes to handsignals (and colonialism) rock always beats scissors.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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

The first memorial dedicated solely to the Black troops who fought for the Union.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

This poor little statue is the most vandalized memorial in Washington.

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

An overlooked tribute to one of the most important peace deals in American history.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This grand gothic brewery has been pumping out suds for over a hundred years.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

These barriers stand as stark reminders of Northern Ireland's troubled past.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.