A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A building shaped like the Army Corps of Engineers logo, because why not?

Home to a vast and influential collection of Shakespeareana.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

The span is crooked and made from two older recycled bridges.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

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

A historic ruin just 20 feet away from a busy highway onramp.

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

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

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

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

The national park was once a plantation estate.

There's a crumbling old mansion inside the Smithsonian National Zoo.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

People escaping slavery may have hidden inside a corpse vault.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Fittingly, America's museum of architecture is itself a magnificently designed old building.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The United States Capitol's former columns still stand.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.