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

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

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

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A toxic ghost town sitting atop a massive coal fire.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Mysterious rocks that ring musically when struck.

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

A historic grist mill and active sluice on the Black River.

A field of nothing but boulders which resembles a giant's gravel driveway.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Ohio's 19th-century communist micro-society.

In this relatively flat state the highest point is an honored place.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.