Both the building and blades of this reconstructed 19th-century windmill can turn in a breeze.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

The elevator hidden in a smokestack on Roosevelt's yacht now serves as a monument to the former president.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

An original apothecary from 1792.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

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

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

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

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A historic neighborhood church is reborn as a psychedelic arts collective.

The oldest continuously operating fish market in the United States.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

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

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

This Georgian-style house built in 1746 is the oldest surviving structure in Bladensburg.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

George Washington once stopped by this house for dinner.

A super-sized promotional trick that is now a D.C. landmark.