Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

Winding country roads in eastern West Virginia lead to an extraordinary place populated by fiberglass giants.

Obscure Freemasons still live in D.C.’s largest private residence.

This rowhouse doubles as one of the most photographed spots in the nation's capital.

After James Madison's death, his wife and former First Lady Dolley Madison lived in this yellow building near the White House.

The hippo that stands on this university campus was once a drunken flea market purchase.

A small and somewhat hidden memorial to 68 local veterans of the Vietnam War.

The only labyrinth within the city of Alexandria.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

The system of air guns are fired off remotely to scare any trespassing avians.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

Right next to departures—how convenient!

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

America's first federal monument.

This rudder is one of the few remnants of a shipyard that once operated on the banks of the Potomac River.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

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

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

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