This historic boathouse was constructed using salvaged lumber from burned barns.

The only road through the heart of Glacier National Park.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

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

Recorded as the first person buried in Arlington Cemetery.

The only U.S. Senator to die on the field of battle is buried in San Francisco but memorialized at Balls Bluff Regional Park.

This "castle" is actually a limestone and quartz formation hidden along a trail.

The former home of Dr. E.B. Henderson, also known as the "Father of Black Basketball."

This monument traces the segregation line that inspired the first rural branch of the NAACP.

Remnants of a wall built to separate Black residents of Hall's Hill from a newly built subdivision are a grim reminder of segregation in 20th-century Virginia.

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

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

A natural spring situated on the grounds of the Hawthorne estate.

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

A piece of the Ludendorff Bridge, also known as Remagan Bridge, calls this military base home.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

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

This monument is dedicated to those lost on June 6, 1944, in the town with that day’s highest per-capita casualty rate.

This marker at the entrance to the Humphreys Engineer Center honors the former Chief of the Army Corps of Engineers.

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

These five Art Deco homes were meant to solve the "small house problem."

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

A spectacular tribute to statesman and philanthropist Andrew Mellon.