One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

The real-life site of Ichabod Crane's infamous gourd attack.

The U.S. Fish Commission’s effort to mass produce carp.

The former home of elite checkers battles of the Capital Pool Checkers Club.

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

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

Over the last century, this elegant columned facade has been home to the headquarters of a bank, several nightclubs, and a restaurant.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A rare example of a rural school in Washington, D.C.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

The final residence of an educator, civil rights leader, and presidential advisor was also the first headquarters of the National Council of Negro Women.

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

Now a living classroom, this house was once the home of Reverend James Clinton Dent, a formerly enslaved man and a pastor.

One of the first Second Empire-style buildings constructed in North America.

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

The former home of the woman who successfully fought to integrate restaurants in Washington, D.C.

Mysterious installations bring levity and light to a sometimes stodgy city.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

This statue of the "father of television" stands prominently in the United States Capitol.