This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

An alternate history park where the Union Army loses the war... to dinosaurs.

The skeletal white beams stand as a monument to religious dissent.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

This free, take-a-book shop seems like a trick but isn't.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

This museum sits on the site of a decommissioned military communications base.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

FDR's Art Deco hospital tower was hopelessly inefficient.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.