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

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

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

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

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

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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

A haunting tribute to pioneering photographer Clover Adams.

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

The oldest continuously operating fish market in the United States.

Largest Roman Catholic church in North America.

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

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

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

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

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

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

These unusual rooms on wheels are holdovers from the 1960s.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.