A museum dedicated to exhibiting remarkable outsider art.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Art deco landmark on the outskirts of Washington, D.C.

Largest Roman Catholic church in North America.

Before Nixon, "watergate" meant canals.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

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

Home to items never before seen by the public.

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

Decades before the scandal, this staircase on the river was a literal "water gate."

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

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

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

A wondrous old library overlooking the nation's capital.

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

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

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

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

When it comes to handsignals (and colonialism) rock always beats scissors.