The smallest covered bridge in Maryland.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Golden plates containing what would become the Book of Mormon were believed to be buried on this New York hillside.

Curtiss is a forgotten figure in the early history of flight.

A local prank turned town icon.

In the mid-19th century, an eight-sided house was the latest fad.

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

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

What remains of the simple red brick chapel where the women's rights movement began.

An abandoned asylum where patients have been forgotten but their possessions remain.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

Time travel with sweets across history at this research-based candy store.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

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

An eponymous directional signpost erected by the first president of the United States.

Little has changed in the way that this mill operates since the 18th-century.

A glimpse into early 19th-century education.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

Bizarre Cavern.

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.