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

A portal into the bricked up canal that runs through the heart of Washington D.C.

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

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

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

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

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

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

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

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

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Where the U.S. government kept its actual treasure, before Fort Knox.

Also known as the Founding Church of Scientology.

A line of blue paint marks the route of the inaugural parade.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

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

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

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

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