A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

Soaring over the Niagara Whirlpool since 1916.

A local prank turned town icon.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

One of the last few period-correct, hand-operated canal locks in the country.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

This one-room cabin where the young colonel slept during the French and Indian War.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

The brainchild of Eleanor Roosevelt, her "Little Village" was a collectivist dream.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This university transit system is a 1970's vision of the future.

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

The crash of this great airship signaled the beginning of the end for dirigibles.