This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Yo, Adrian!

Venture into the past with an unlisted exhibit hall featuring extinct birds.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The oldest continuously operating fish market in the United States.

This lovely pocket park is one of the most under appreciated in D.C.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

Home to a vast and influential collection of Shakespeareana.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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

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

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

This historic building is now home to the Public Access Corporation for the District of Columbia.

Largest Roman Catholic church in North America.

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.

This taxidermy horse was a Civil War hero.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

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