The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

Why have you never heard of the second most popular tourist site in New York?

Fossilized sea bottom and lime quarry.

A tiny village in Upstate New York ushered in the precursor to drive-in movies.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

An upstate New York garage advertises its services by literally putting the automobile above all else.

This historic church with a connection to "Uncle Sam" is now a fraternity house.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A CT scan revealed the identity of this 3,000-year-old mummy that everyone erroneously thought was female.

A 13,000-year-old mastodon skeleton was found during the construction of a 19th-century New York mill.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

The small burial plot is located in a mall parking lot.

A serene plaza that commemorates one of the Granite State's most iconic figures.

This donated headstone marks the grave of a pair of elderly women who were mysteriously murdered.

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

One man built this massive wall to keep his neighbor from complaining about working on Sundays.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

In order to save this beloved rock, locals blew it up and put it back together piece by piece.

This once luxurious Catskills resort is now a haunting ruin.