The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

This memorial honors five journalists who were killed in a mass shooting in 2018, and affirms the importance of the first amendment.

This historic building is now home to the Public Access Corporation for the District of Columbia.

This hidden treasure provides a charming access point along the south side of Baker Park.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

Rumors persist that a bottle of whiskey is sealed within this Demijohn-shaped adornment.

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

The first museum in the U.S. to address human rights issues in China.

Surrounded by a verdant garden and a backdrop of ivy, a monument to beloved poet Khalil Gibran stands outside of the Lebanese embassy.

The ruins of a castle sat decaying in this park for years before a massive renovation restored this area to its past beauty.

Historic barracks utilized during both the Revolutionary War and the Civil War.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

The longest covered bridge in Delaware.

A well-worn trail through thick woods in northern Montgomery County leads to an old schoolhouse.

The all-but-forgotten cemetery is Eastern Loudon County's largest African-American burial ground.

The first national memorial to honor all women suffragists stands on land where suffragists were once imprisoned.

This restored house built from a Sears kit in the 1930s is a physical remnant of FDR's New Deal following the Great Depression.

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

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

A secret rendezvous spot where John S. Mosby and his Rangers would meet to divvy up their loot after raids.

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

This abandoned church languishing for decades is now one man's passion project and subject of paranormal investigators.

The last of Fairfax County's one-room schoolhouses.

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