An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

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

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A historic arena where the Beatles played their first concert in the U.S.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

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

Parking garage where Bob Woodward met Watergate source "Deep Throat."

The towering figures were created from the cemetery's fallen old-growth trees.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

A haunting tribute to pioneering photographer Clover Adams.

A memorial to a shareholder activist feared by CEOs around the United States.

Also known as the Founding Church of Scientology.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

A secret greenspace hides atop a Capitol parking garage.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

After his presidency, George Washington planned to live only a few blocks from the Capitol building.