The "lovely red Vega" of the legendary record-settling pilot.

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

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

An Industrial Revolution-era public work that purified water using nothing but sand.

A super-sized promotional trick that is now a D.C. landmark.

A computer bug so primitive it was an actual insect.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

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

The oldest continuously operating fish market in the United States.

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

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

The national park was once a plantation estate.

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

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

The house where John Wilkes Booth conspired with his co-conspirators.

When it opened during the final years of the embargo, all the drinks and cigars were free.

A haunting tribute to pioneering photographer Clover Adams.

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

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

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

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.