The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

This mural celebrates the early integration of a New Hampshire baseball team.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

The smallest post office in the United States is no bigger than a broom closet.

This isolated airport in the middle of the Everglades sees more alligators than planes.

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

This statue commemorates the importance of hat manufacturing to Danbury, once known as the "Hat City of the World."

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

This methodist cemetery is slowly receding into the wilderness along a Maryland highway.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

One of the earliest and best-preserved buildings in Charles County, Maryland.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

Electrical pylon in the shape of Disney's beloved mouse.

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

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.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.