A painfully obvious spy house sits right across the street from the Russian Embassy.

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

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

Home to items never before seen by the public.

Where you can hail your favorite fictional commanders-in-chief.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

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

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

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

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

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

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

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

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

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

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

People escaping slavery may have hidden inside a corpse vault.

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

One of the first Second Empire-style buildings constructed in North America.