There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

A humble plaque marks the site where the country music legend was found dead in his Cadillac.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

The world's largest fully steerable radio telescope.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

America's post-nuclear-attack chambers of Congress.

No one knows who painted this mysterious mural in a Penn State basement.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

Could it have picked a better place to land?

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

The first of Lancaster's "rural cemeteries."

The final resting place of the Hollywood star who came to a tragic end.

This public park was the site of the largest civilian disaster of the Civil War.

One of the oldest of its kind.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

An Irish Memorial commemorating those who perished due to potato blight.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.