A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The trials and tribulations of marking Poe's grave.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

The national park was once a plantation estate.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

People escaping slavery may have hidden inside a corpse vault.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A derelict bit of transportation infrastructure hidden in the woods.

This poor little statue is the most vandalized memorial in Washington.

The site of the climactic scene from the classic horror film is now a historic landmark.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

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

The United States Capitol's former columns still stand.